Using too much water or throwing rubbish into our rivers are clear ways that humans can put our water supply in danger ,but we also affect our water supply in less obvious ways .
You may wonder how paving(铺砌) a road can lead to less useable fresh water . A major part of the water we use every day is groundwater . Groundwater does not come from lakes or rivers .It came from underground . The more roads and parking lots we pave ,the less water can flow into the ground to become groundwater .
Human activity is not responsible for all water shortages(短缺). Drier climates are of course more likely to have droughts(干旱) than areas with more rainfall ,but in any case, good management can help to make sure there is enough water to meet our basic needs .
Thinking about the way we use water every day can make a big difference ,too. In the United States ,a family of four can use 1.5tons of water a day ! This shows how much we depend on water to live ,but there’s a lot we can do to lower the number .
You can take steps to save water in your home .To start with ,use the same glass for your drinking water all day .Wash it only once a day .Run your dishwasher (洗碗机)only when it is full 。Help your parents fix any leaks in your home . You can even help to keep our water supply clean by recycling batteries instead of throwing them away .
1..Which of the following is most likely to lead to less groundwater ?
A. paving parking lots . B.Throwing batteries away .
C. Using river water D. Throwing rubbish into lakes .
2. What can be inferred from the text ?
A. All water shortages are due to human behavior .
B. There is much we can do to reduce family size .
C. It takes a lot of effort to meet our water needs .
D. The average family in America makes proper use of water .
3.The last paragraph is intended to .
A.show us how to fix leaks at home
B. tell us how to run a dishwasher
C. prove what drinking glass is best for us
D. suggest what we do to save water at home
4.The text is mainly about .
A. Why paving roads reduces our water
B. how much we depend on water to live
C. why droughts occur more in dry climates
D. how human activity affects our water supply
A Healthy Habits Survey（调查）shows that only about one third of American seniors have correct habits. Here are some findings and expert advice.
1.How many times did you brush your teeth yesterday?
·Finding：A full 33% of seniors brush their teeth only once a day.
·Step：Remove the 300 types of bacteria in your mouth each morning with a battery-operated toothbrush. Brush gently for 2 minutes, at least twice a day.
2.How many times did you wash your hands or bathe yesterday?
·Finding：Seniors, on average, bathe fewer than 3 days a week. And nearly 30%wash their hands only 4 times a day-half of the number doctors recommend.
·Step：We touch our faces around 3,000 times a day-often inviting germs（病菌）to enter our mouth, nose, and eyes.Use toilet paper to avoid touching the door handle. And, most important, wash your hands often with hot running water and soap for 20 seconds.
3. How often do you think about fighting germs?
·Finding：Seniors are not fighting germs as well as they should.
·Step：Be aware of germs. Do you know it is not your toilet but your kitchen sponge（海绵）that can carry more germs than anything else? To kill these germs, keep your sponge in the microwave for 10 seconds.
1.What is found out about American seniors?
A. Most of then have good habits.
B. About one third of them brush their teeth only once a day
C. All of then are fighting germs better than expected .
D. Nearly 30%of then bathe three days a week .
2.Doctors suggest that people should wash their hands .
A. eight times a day B. three times a day
C. four times a day D. twice a day
3.Which of the following is true according to the text ?
A. We should keep from touching our faces .
B. There are less than 300 types of bacteria in the mouth .
C．We should wash our hands before touching a door handle .
D. A kitchen sponge can carry more germs than a toilet .
4.The text probably comes from .
A. a guide book B. an official document
C. a book review D.a popular magazine
That afternoon I was sitting at my favorite table in a restaurant, waiting for the food I had ordered to arrive. Suddenly I ______ that a man sitting at a table near the window kept glancing in my direction, ______ he knew me. The man had a newspaper ______ in front of him, which he was ______ to read, but I could ______ that he was keeping an eye on me. When the waiter brought my ______the man was clearly puzzled (困惑) by the ______ way in which the waiter and I ______each other. He seemed even more puzzled as ______went on and it became ______that all the waiters in the restaurant knew me. Finally he got up and went into the ______. When he came out, he paid his bill and ______without another glance in my direction.
I called the owner of the restaurant and asked what the man had ______. “Well,” he said, “that man was a detective (侦探). He ______ you here because he thought you were the man he ______. ” “What? ” I said, showing my ______. The owner continued, “He came into the kitchen and showed me a photo of the wanted man. I ______ say he looked very much like you! Of course, since we know you, we told him that he had made a ______. ” “Well, it’s really ______I came to a restaurant where I’m known, ” I said. “______, I might have been in trouble.”
1.A. noticed B. understood C. knew D. recognized
2.A. since B. as if C. though D. even if
3.A. flat B. open C. cut D. fixed
4.A. hoping B. thinking C. pretending D. continuing
5.A. see B. find C. guess D. learn
6.A. menu B. bill C. paper D. food
7.A. direct B. strange C. familiar D. funny
8.A. chatted with B. looked at C. laughed at D. talked about
9.A. the waiter B. time C. I D. the dinner
10.A. true B. hopeful C. clear D. possible
11.A. restaurant B. washroom C. kitchen D. office
12.A. left B. acted C. sat down D. calmed down
13.A. wanted B. tried C. ordered D. wished
14.A. met B. caught C. followed D. discovered
15.A. was to beat B. was dealing with C. was to meet D. was looking for
16.A.surprise B. care C. worry D. regret
17.A. must B. can C. need D. may
18.A. discovery B. mistake C. decision D. fortune
19.A. a pity B. natural C. a chance D. lucky
20.A. Thus B. However C. Otherwise D. Therefore
My father____ a teacher, but now he works in a factory.
A. was used to be B. used to be
C. used to being D. is used to being
John opened the door. There____he had never seen before.
A. a girl did stand B. a girl stood
C. did a girl stand D. stood a girl
My mother has two brothers, both of ____ graduating from Beijing University．
A．whom B．them C．which D．who
