The scientist spent years alone in the forest, ______ by eating wild fruit and small animals.
A. surviving B. survived
C. to survive D. having survived
—Wow, you have a really good voice. I_____ you were good at singing.
—Thank you.
A. haven’t known B. hadn’t known
C. didn’t know D. don’t know
The main street is lined with small stands and shops _____ sell almost anything you can imagine.
A. what B. where C. who D. which
假如你是李华，最近美国梅德韦中学访学团将到你校交流学习中文。请你以学生代表的身份，根据以下内容要求，用英语拟写一份发言稿。
内容要求： 1．表示欢迎；
2．介绍几种提高中文听说能力的方法；
3．表达希望和祝福。
注意：1．开头和结尾已给出，不计入总词数；
2．可适当增加细节，以使行文连贯；
3．词数：120左右。
Hello, everyone.
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Thank you.
阅读下面短文，根据以下提示：1）汉语提示；2）首字母提示；3）语境提示，在每个空格内填入一个适当的英语单词，并将该词完整地写在右边相对应的横线上。所填单词要求意义准确、拼写正确。
Thirty years ago, communication wasn’t so convenient. And my grandparents wrote letters to their friends and 1. __________（亲戚）. They wrote to each2. __________ because Grandpa worked in the city and Grandma lived in the country. It 3.__________（花费）about one week to deliver a letter. When Grandma asked questions in her letter, she had to wait more than two weeks to get the answers! If they had anything 4.u______ and to deliver immediately, they had to send telegrams.
The telephone became popular in the early 1990s. But not until 1998 did my dad’s family 5. h_________ a telephone. Although it was much 6. f than writing letters, it was still inconvenient. Once Dad arrived home late because he helped a granny 7. __________ his way. My grandparents were very worried because they couldn’t get in 8. with him. Then my dad bought his first mobile phone in 2002.
My favorite communication tool is the mobile phone. I have used it since my sixteenth birthday. My parents and friends can find me 9.w I am. It’s very convenient, but at the same time it is easy to get bothered, especially when I want to stay alone. Sometimes I have headaches after 10.______（谈话）on the mobile phone for a long time.
Scientists have discovered a special biological behavior in dolphins（海豚） that could lead to a treatment for late-onset diabetes（晚发的糖尿病） in humans. Studies on dolphins found that healthy dolphins switch into a diabetic-like state overnight when they are not feeding, but return to normal when they eat the following morning.
The extraordinary finding has led scientists to suggest that dolphins have “genetic switch” that allows them to imitate diabetes while they are not feeding for a night, without suffering any ill effect.
If researchers can identify a similar genetic pathway in human, they may be able to develop drugs to effectively switch off diabetes. Some 2.2 million people in Britain have type 2 (or late-onset) diabetes, a figure that is expected to reach 4 million by 2025 as a consequence of rising levels of obesity（肥胖）.
The tissues of people with type 2 diabetes have become resistant to insulin（胰岛素） so they lose the ability to control sugar levels in their blood. The condition can damage the heart, eyes, kidneys（肾脏） and nerves and contribute to 5% of all deaths, according to the World Healthy Organization.
Dolphins appear to imitate diabetes to keep high levels of blood sugar when food is rare. Like humans, dolphins need some sugar in their blood for their brains to function normally. Venn-Watson’s team analyzed 1,000 blood samples（样本） from 52 dolphins while they didn’t eat anything overnight and fed in the morning. At night time, the dolphins’ metabolism（新陈代谢）changed greatly and showed similar characteristics to that seen in people with type 2 diabetes.
“It is our hope that this discovery can lead to new ways to prevent, treat and maybe even cure diabetes in humans,” said Stephanie Venn-Watson, director of clinical research at the National Marine Foundation in San Diego.
1.What’s the main idea of the passage?
A. Humans get some idea of treating diabetes from dolphins.
B. Dolphins can switch into a diabetic-like state overnight.
C. Humans can suffer the same disease as dolphins.
D. Dolphins should be fed regularly to avoid diabetes.
2.The key to applying the finding to curing human diabetes lies in ____________.
A. producing insulin in a larger amount
B. developing drugs from healthy dolphins
C. identifying a similar genetic pathway in human
D. analyzing more blood samples from hungry dolphins
3. Which of the following statements is TRUE according to the passage?
A. Scientists have found a similar genetic switch in humans.
B. More British people will suffer type 2 diabetes due to obesity.
C. 2.2 million people with type 2 diabetes die in Britain every year.
D. Dolphins imitate diabetes to avoid a high blood sugar level.
4.What will happen to dolphins if not fed for a night according to Venn-Watson?
A. Their metabolism breaks down.
B. They become resistant to insulin.
C. Their heart and kidneys are damaged.
D. They keep high levels of blood sugar.
