So far, no ____________（科学的）studies have shown that shark fins are good for our health.
阅读下面短文，在空白处填入适当的内容（1个单词）或括号内单词的正确形式（不超过3个单词）。
For many people around the world, the third Sunday in June is a day to respect their fathers. It is Father's Day and 1.（celebrate）Father's important role in the family.
Father is just 2. important to a child as Mother is. For daughters, Father is the first man they admire, while for sons, Father is an idol（偶像）and the 3.（strong）man in their life.
The idea of celebrating Father's Day 4.(give) by Sonora Smart Dodd of Washington in 1909. She wanted a special day to honor（纪念）her father William Smart, his wife died 5. she was giving birth to their sixth child. Mr. Smart was left 6.（raise）the newborn and his other five children only by himself. After Sonora became an adult, she understood the strength and selflessness（无私）her father had shown in raising his children as a single parent. The first Father's Day was celebrated 7. June 19, 1910 in Washington. And it was in 1966 that the then USA President Lyndon Johnson officially made the third Sunday of June Father's Day. In 1972, the then USA President Richard Nixon made 8. a national holiday.
Over the years, the idea of celebrating Father's Day on the third Sunday of June 9. （spread）across the world. Celebrating the day gives people a chance to express their love and thanks to their fathers. Celebrating the day also makes fathers feel that their contributions are acknowledged（认可）by their children and 10.（social）.
Last Sunday, Mark invited me to help serve dinner at Tent City. A number of _________ had been set up for the homeless in the area.
My husband was not available to _________ our two sons, so I took 9-year-old Tony and 5-year-old Toby with me. Many of the people we _________ had missing teeth or wore dirty clothes. My sons had a lot of questions as what they saw challenged their _________ ideas about how people lived in the world.
"Why don't they buy food _________ us?" "Why don't they have homes?"…
We talked about the _________ why people ended up in that type of situation. And I mentioned the importance of creating a safety net for them, " Sometimes the safety net is other people who can share some of their time and resources（资源）," I _________.
I was _________ that my boys would make too much noise. But to my _________, the people we served were quite thankful that I had brought them. Many said how fun it was to have __________ children around.
After dinner, I saw Tony sit together with several elderly men. He was __________ them talk about sports. To be honest, I had __________ realized that he was such a good listener. __________ some people returned to their tents, I heard Tony say to them, "Thanks so much for having dinner with us." I could see that his simple words had __________ them greatly. I hugged him a little tighter（更紧的）because what he said had touched me too. It was a great reminder that treating people with __________ can lift all of us up.
1.A.houses B.shops C.tents D.schools
2.A.look up B.look after C.look into D.look for
3.A.raised B.served C.saved D.admired
4.A.good B.different C.strange D.common
5.A.like B.from C.for D.with
6.A.excuses B.wishes C.interests D.reasons
7.A.explained B.agreed C.realized D.suggested
8.A.angry B.worried C.mad D.crazy
9.A.sadness B.regret C.surprise D.excitement
10.A.polite B.active C.intelligent D.hard-working
11.A.agreeing with B.running after C.depending on D.listening to
12.A.never B.always C.ever D.usually
13.A.If B.Although C.As D.Because
14.A.touched B.disappointed C.hurt D.shocked
15.A.power B.smile C.respect D.encouragement
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
If you're a kid who likes to have fun and chat with friends online, here's how you can stay safe and avoid problems.
Stick to safer sites. Your parents and teachers can guide you to the best sites for you. Some sites have age restrictions（限制）, so you might want to lie about your age. 1.
Guard your passwords. If someone can sign in（登录）as you, you will have no control over what they do or say. 2. So don't share your passwords with anyone except your parents.
Limit what you share. 3. If you're not sure if you should share something, ask a parent. Remember that anything you put online or post on a site is there forever, even if you try to delete it. If you wouldn't want your class to know or see something, you shouldn't share it with anyone online, not even your best friends.
4. Tell an adult right away if someone says something to you that makes you uncomfortable. Also tell an adult if you see anyone bullying（欺凌）or saying strange things to other kids.
Be choosy about your online friends. Some sites let kids make friends with people they don't know. 5.Never agree to meet an online friend in person or give out personal information about yourself.
A.Always tell if you see strange or bad online behavior.
B.But online friends are not the same as the friends in real life.
C.It's safer to tell the truth and avoid those sites until you're older.
D.We should be hard on other people online.
E.And everyone will think it's you!
F.Communicate more with your friends.
G.Never tell a stranger where you live or your phone number.
Scientists around the world are racing to create and test vaccines（疫苗）to help protect people against the novel coronavirus（新冠病毒）. They are making progress, but it will be quite a while before any vaccines are ready.
There are many different ways to make vaccines. At least 115 different vaccines for the novel coronavirus are being developed around the world right now. Many of them may not work or may have side effects that can be dangerous. That is why testing is very important.
Before a vaccine is ever tested on humans, it's first tested on animals to make sure it seems safe. Testing the vaccine on humans is done in several different phases（阶段）. In Phase 1, a small group of people are given small amounts of the vaccine to see if it has any bad effects. Phase 2 still tests the vaccine’s safety, but it's mainly a test to see if the vaccine seems to work, If Phase 2 goes well, the vaccine can begin Phase 3. During Phase 3, the vaccine is tried on a much larger group of people to see how well it works.
Because of the serious and worldwide impact（影响）of the novel coronavirus, there is huge pressure to develop a working vaccine quickly. It normally takes seven or more years to develop a safe vaccine that works well. Now drug companies are hoping to create working vaccines in 12 or 18 months.
But health experts also warn that rushing too much could be dangerous. A vaccine with harmful effects could cause more problems than it solves.
1.According to the passage, the scientists who are making vaccines are ____________.
A.hard-working and careful B.patient and easy-going C.kind and curious D.caring and brave
2.How long does it take to create working vaccines in the usual way?
A.Less than six years. B.More than ten years.
C.Twelve to eighteen months. D.About seven years.
3.Which of the following is TRUE?
A.There are only three phases in testing vaccines.
B.Working vaccines must be created in a short time.
C.Vaccines have already been developed.
D.Rushing too quickly in creating vaccines may bring more problems.
4.What's the best title of the passage?
A.Rush for a Vaccine B.Fight against the Disease
C.Protect People against the Virus D.Create Working Vaccines
Do you know about Psephurus gladius? It's a Chinese paddlefish known as "king of all national freshwater fish". However, it is announced that the Chinese paddlefish living in the Yangtze River has become extinct（灭绝的）.
A paper from Science of the Total Environment shows that the largest freshwater fish in China might have gone extinct between 2005 and 2010.Wei Qiwei, author of the paper, said in September, 2019, some experts supposed that the first-class protected fish had been extinct already.
The Chinese paddlefish was about 2 to 3 meters long and could grow longer than 7 meters. The fish had lived on the earth for 15 million years. The latest discovery of the fish was made in 2003.Scientists helped the fish to return and tried to track（追踪）it. Unluckily, a boat accident caused the tracking efforts to fail. Since then, no discovery has been reported and no such fish has been kept in captivity(圈养).
"The Chinese paddlefish was so big that it was hard to raise in captivity," Wei said. Between 1984 and 1993, he once tried to save four fish, but only one stayed alive and returned to the river.
The extinction of the fish has called public attention as people expressed sadness over the death, hoping such animals would be better protected so that future generations could see them. From Jan 1,2020, China began a 10-year fishing ban（禁令）on important areas of the Yangtze River to protect Biodiversity（生态多样性）in China's longest river.
1.It can be learned from the passage that ____________.
A.the Chinese paddlefish was hunted too much in the past
B.the Chinese paddlefish was the largest freshwater fish in the world
C.the Chinese paddlefish could grow to be over 7 meters in length
D.the Chinese paddlefish has never been seen so far
2.What happened after the boat accident mentioned in Paragraph 3?
A.Some scientists saved the fish. B.People failed to track the fish.
C.The fish lost its life. D.The fish was kept in captivity.
3.Why couldn't the Chinese paddlefish be raised in captivity?
A.Because of its living habits. B.Because of its large size.
C.Because of is special diet. D.Because of the high cost.
4.What's the writer's purpose in writing the passage?
A.To show people's sadness about the fish's death. B.To explain how the fish died out.
C.To call on people to protect animals. D.To introduce a first-class protected fish.
