假设你是红星中学高三学生李华，你的美国朋友Jim对北京的历史文化感兴趣。你校暑假期间将为交换生组织“Knowing Beijing”游览活动，请你写信邀请Jim来参加。内容包括：
1时间安排；
2活动内容；
3邀请参加。
注意：1．词数不少于50；
2．开头和结尾已经给出，不计入总词数。
Dear Jim,
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
Li Hua
Many people often find themselves waking up in the middle of the night, unusually awake and excited. 1. . That's really frustrating. However, there is no need to worry. Here are some effective ways to help you fall asleep again.
Remain in bed. For you to fall asleep, your heart rate needs to slow down. When you get up, your heart rate goes up. So, avoid going to the bathroom during the night if you can. Do not eat too little or too much for dinner. Do not drink and fill your bladder （膀胱）before bed. 2. . It may make you fall asleep faster, but it may also disrupt
your sleep later in the night.
Stay in the dark. When you cannot sleep, LED lights on printers and cable boxes may be the reason. The same is true for light streaming in through cracks in curtains. 3.. You should cover lights with tape and wear a sleep mask. A popular choice has deep eye cups so your eyes can open and shut while you wear them.
Quiet your mind. Try ways to relax, such as deep breathing, meditation, and mindfulness exercises. 4. . The point is to keep your brain busy with something that is not demanding and is relaxing.
5. . If your wake-up time is 6:30 a.m. and your clock reads 3:00 a.m., do not think Oh no! I have only three hours left! Instead, say to yourself Oh great! I have three more hours to sleep!
You have a problem if you wake three times a week for more than three months. It may affect your quality of life. You need to find a sleep expert who can help identify the cause and fix it.
A.Think in a positive way.
B.Maintain a calm attitude.
C.They may keep you awake.
D.Most importantly, avoid alcohol in the evening.
E.You can do simple math problems in your head.
F.Getting up to do some mild exercise is also helpful.
G.Tossing and turning in bed, they are unable to fall asleep.
Microplastics are everywhere in our environment. It's hardly surprising that the tiny fragments have also been found in humans. A new study shows that Americans are consuming as many as 121,000 particles each year.
Measuring 50 to 500 microns in length, microplastics come from a variety of sources, including large plastics that break down into smaller and smaller pieces. Therefore, much remains unknown about the common existence of these materials within the human body, as well as their impact on human health.
Hoping to fill in some of these gaps, a research team led by Kieran Cox, a PhD candidate at the University of Victoria, looked at 26 papers assessing the amount of microplastics in commonly consumed food items, among which are seafood, sugars, salts, honey, alcohol and water. The team also evaluated the potential consumption of microplastics through inhalation （吸入）using previously reported data on microplastic concentrations in the air and the Environmental Protection Agency's reported respiration rates. Based on these data, the researchers calculated that our annual consumption of microplastics via food and drink ranges from 39,000 to 52,000 particles. When microplastics taken in through inhalation are taken into account, the range jumps to between 74,000 and 121,000 particles per year.
The authors of the study found that people who drink exclusively from plastic water bottles absorb an additional 90,000 microplastics each year, compared to 4,000 among those who only consume tap water. "This shows that small decisions, over the course of a year, really matter and have an impact." Cox says. The new study, according to its authors, was the first to investigate "the accumulative human exposure" to microplastics. But in all likelihood, the research tells only a small part of the entire story. Collectively, the food and drink that the researchers analyzed represent 15 percent of Americans' caloric intake. The team could not account for food groups like fruits, vegetables and grains because there simply is not enough data on their microplastic content.
For those worried about microplastic consumption, cutting down bottled water is a good place to start. But to the heart of the problem, we have to stop producing and using so much plastic.
1.What makes it difficult to know microplastics commonly exist in the human body?
A.The quality. B.The quantity.
C.The shape. D.The size.
2.How did Kieran Cox's team calculate the potential consumption of microplastics?
A.By studying papers. B.By comparing the impacts.
C.By analyzing the data. D.By conducting experiments.
3.Which of the following is true according to the text?
A.Drinking less plastic bottled water helps to take in fewer microplastics.
B.The study is among the earliest to investigate human exposure to microplastics.
C.Cox's team gained comprehensive information of microplastics taken in by humans.
D.People consume 74,000 to 121,000 particles of microplastics per year from food and drink.
4.What is the best title for the text?
A.The Potential Problems of Microplastics
B.Microplastics Coming From Various Sources
C.Microplastics Found Within Human Bodies
D.The Impact of Microplastics on Human Health
Food experts say washing could spread the germs on your turkey in the kitchen sink or nearby food. But it's been a challenge trying to convince cooks to stop rinsing （冲洗）off raw poultry. Germs that can make people sick are common in the guts of healthy poultry and are legally allowed to be on raw turkey and chicken. The assumption is that nobody eats their poultry raw, and that thorough cooking will kill the bacteria.
The do — not — wash raw poultry advice from the USDA is relatively new and perhaps hasn't caught on because it goes against the common belief that washing makes things clean, said Chapman. Benjamin Chapman, a study author and food safety expert at North Carolina State University, said the instinct to wash raw poultry goes back at least decades when people relied more on visual clues to spot problems with poultry. Meanwhile, washing hands and surfaces are also important.
But food preparation is a complicated act, and germs from poultry can be spread even if it's not washed, especially when birds are removed from packaging.
The USDA-funded study stresses that point. Researchers sprayed raw chicken with a harmless strain of E. coli （大肠杆菌）and watched volunteer cooks at test kitchens. Among those who washed their raw chicken, about a quarter ended up spreading the bacteria to their lettuce. But even some of those who did not rinse the chicken got germs on the lettuce. And there are other opportunities for germs to survive on turkeys: melting and cooking.
To ensure a bird is thoroughly cooked, they say to use a thermometer to check that the deepest and thickest parts of it have reached 165 degrees. Even after the meal is cooked, you aren't out of the danger zone. To keep turkeys and other leftovers safe, experts say they should be refrigerated after two hours.
1.People don't accept USDA's advice because____.
A.the advice is relatively new
B.cleaning seems more trustworthy
C.cooks clean the turkey before cooking it
D.heat can kill most germs and no one eats raw food
2.What can be concluded from Paragraph 4?
A.Food packages carry germs.
B.Hands and surfaces are easy to get E. coli.
C.Germs from a turkey can be spread whether it is washed or not.
D.Multiple methods should be applied to food to get rid of germs.
3.Which way may help to cook a turkey safely?
A.Rinse off the turkey before it is heated.
B.Keep the turkey away from the lettuce and refrigerator.
C.Wash hands and packages before taking out the turkey.
D.Use a thermometer to check the temperature of the turkey.
4.From which section of a magazine is the text probably taken?
A.Culture. B.Science.
C.Education. D.Medicine.
Kyle Cassidy and three other members of the Annenberg Running Group were stretching on the grounds of the University of Pennsylvania, waiting for a few latecomers. The Penn colleagues and other community members meet three days a week for a roughly 30-minute jog and an occasional lecture. That's right― during some runs, one of them delivers a talk. Topics range from the brain to Bitcoin.
But on this day last January, it would not be their normal run. The first clue that something was off was the man who sprinted past them. "Running at an amazing pace," Cassidy told Runner's World admiringly. Cassidy discovered why the sprinter was so fleet of foot when another man ran by, yelling, “Help! He took my phone and laptop!"
At that, the group did what running clubs do: They ran, trailing the suspect down the streets of Philadelphia until he ducked into a construction site. The runners split up. Cassidy ran around to the far side of the site to cut the thief off while the others wandered the neighborhood hoping he had dumped the loot （赃物）in a backyard.
No luck. So they decided to ask residents whether they'd seen the guy. When they knocked on the door of one row house, they were in for a surprise. Unknown to them, he had already emerged from the construction site—and was hiding behind a bush by that very house. As the owner opened the door, the suspect darted out from behind the bush ... and right into the arms of campus police, who'd joined the chase shortly behind the runners.
The members of this running group are not hard-core athletes. But they do understand the benefit of a little exercise. ''Running is typically a useless sport where you turn fat cells into heat," Cassidy told The Philadelphia Inquirer. "But occasionally it can be useful, and here was one of those opportunities."
1.Why do the group members gather together?
A.To do some stretching. B.To have a regular run.
C.To deliver a lecture. D.To cover some topics.
2.What does the underlined word "sprinted" in Paragraph 2 probably mean?
A.Dashed. B.Pushed.
C.Jumped. D.Escaped.
3.We can infer that the success of the chase is mainly due to____ .
A.the assistance of the runners B.the owner of the row house
C.the campus police on patrol D.the joint efforts of the people
4.Which of the following best describes Cassidy?
A.Athletic and generous. B.Courageous and ambitious.
C.Helpful and humorous. D.Thoughtful and demanding.
This is What a REAL Silver Dollar Looks Like
If you trust in the yen, the euro,
and the dollar...stop reading.
Because this is a story about
the sliver coin EVERYBODY wants.
You read the headlines.You know that troubled economic times have put global currency on a rollercoaster(过山车) ride.But millions have found a smarter way to build longterm value with highgrade collectable silver.And right now, those people are lining up to secure some of the last 2012 U．S.Mint Silver Eagles, America's Newest Silver Eagle Dollars. Today, you can graduate to the front of that line.Buy now and you can own these brilliant uncirculated Silver Dollars for only $38.95!
You Can't Afford to Lose
Why are we releasing(发行) this silver dollar for such a remarkable price? Because we want to introduce you to what hundreds of thousands of smart collectors and satisfied customers have known since 1984—New York Mint is the place to find the world's finest highgrade coins.That's why we're offering you this Brilliant Uncirculated 2012 U．S.Silver Eagle for as little as $37.45(plus s/h)．
Timing is Everything
Our advice? Keep this to yourself.Because the more people who know about this offer, the worse it is for you.Demand for Silver Eagles in 2011 broke records.Experts predict that 2012 Silver Eagles may break them all over again.Due to rapid changes in the price of silver, prices may be higher or lower and are subject to(受……影响) change without notice.Supplies are limited.Call immediately to add these Silver Eagles to your holdings before it's too late.
Offer Limited to 40 per household
2012 American Silver Eagle Coin
Your cost 14 Coins $38.95 each＋s/h
59 Coins $38.45 each＋s/h
1019 Coins $37.95 each＋s/h
2040 Coins $37.45 each＋s/h
Note：$10 s/h(shipping and handling) for each purchase
For fastest service, call tollfree 24 hours a day
18882017143
Offer Code(代码) ASE17704
Please mention this code when you call.
New York Mint
14101 Southcross Drive W．， Dept.ASE17704
Burnsville, Minnesota 55337
www.NewYorkMint.com
1.What is stressed in the ad?
A.The coin is of high quality and worth collecting.
B.The coin can be circulated as a currency.
C.Limited supplies guarantee a stable price of the coin.
D.Demand for the coin is bound to break records.
2.If you buy six 2012 U．S.Mint Silver Eagles by post, you should pay at least ________.
A.$230.7 B.$233.7 C.$240.7 D.$243.7
3.The ad strongly encourages people to purchase the silver coins by ________.
A.shopping online
B.making a phone call
C.lining up in front of the stores
D.writing to the company
