Read the article and select the best answer. Article: HIGH (Human Growth Hormone) could be the favorite drug at the next athletic world championships, and we might never know it. It is a natural substance produced by the human body, and it helps children's bones and muscles to grow. Scientists are allowed to make the drug and it is also legal to take HGH in most countries. HGH is considered a wonder drug for children. It helps many children with growth problems every year. However, some athletes are now taking the drug. HGH helps add muscle in adults and recent research by the World Anti-Doping Agency shows that HGH may improve the sportsman's time by 5% when he takes part in short, fast races. Some athletes say that HGH surely makes them stronger. It also helps them to recover more quickly from injuries. Although it is _ by most professional sports, HGH is almost impossible to test for. The drug is completely natural and it will only show in tests for around 24 hours after taking it. Testing is usually done only during competitions, but athletes use HGH during training, so it is very difficult to know who has used the drug. This makes it very attractive for some athletes. Scientists are developing a new test which will find the drug in the body for up to two weeks. But it isn't going to be easy. Everybody has different levels of natural HGH in their body. For this reason, scientists are warning athletes of the possible problems with the drug. Research shows that HGH increase the risk of cancer. But is this enough to stop athletes from taking it? Scientists don't think so. Some athletes will do all they can to win, and worry about their health later. Question: Scientists are afraid that _ . Options: A: some athletes will pay no attention to the dangers of using HGH. B: there isn't any risk of developing cancer as a result of taking HGH. C: health problems caused by HGH will stop athletes from taking it. D: athletes' results are almost the same, so they want HGH to help them be the best.
A

Read the article and select the best answer. Article: You are probably familiar with the saying:An apple a day keeps the doctor away. A recent research carried out by the Chinese University of Hong Kong may change the saying: An apple a day may keep aging away. The research chose fruit flies , as they share many genes with humans. The fruit flies were either fed normally or had an apple extract added to their diet. It turned out that those fruit flies that were given apple extract lived about 55 days--five days longer than the flies that were normally fed. The research group also found it easier for the flies to walk,climb and move about as they aged. According to the result, the researchers believed that the antioxidants in the apple extract helped clean up dangerous chemicals that cause illnesses,as well as aging. In another study,researchers examined diets of thousands of women. They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke. The apples' genetic code was discovered recently. It allows scientists to develop nicer and healthier fruits. Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer. Apples that kill the desire to eat could also be produced, with the first"extra-healthy''apples on supermarket shelves within just four or five years. The team that keeps studying apple DNA includes 100 scientists from five countries. Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant,which would finally become today's apple tree, experienced a great genetic change. The number of many of its genes doubled. The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches,strawberries and other related fruits. Question: What happened to apples around 65 million years ago according to the research? Options: A: Their genes stopped their development as the environment got worse. B: Their genes became twice in number but they finally died off like dinosaurs. C: They experienced a great genetic change making them get used to worse conditions. D: They went through a similar development to peaches, strawberries and other related fruits.
C

Q: Read the article and select the best answer. Article: Hi! I am Jack. I am thirteen years old. I'm an English boy. Now I'm in China with my parents. I go to a middle school in Tianjin. This is my school day. I get up at half past six. I go to school at seven o'clock and I go to school in my dad's car. I want to walk to school, but the school is far from my home. I usually eat breakfast in the car. School starts at half past seven in the morning. We have five lessons in the morning and we have four lessons in the afternoon. I go home at six o'clock. I eat dinner at seven o'clock. I do my homework at half past seven. After that, I play the guitar. I go to bed at nine thirty. This is my school day. It is happy! Question: Jack goes to school by car because _ . Options: A: he has no bike B: he likes his dad's car C: he doesn't like walking D: his home is far from school
A: D

Read the article and select the best answer. Article: Amy was looking for a gift for her little daughter. Suddenly she stopped before a store of dolls. "Girls like dolls," she thought as she was walking into it. Looking around, she saw a grandma doll - one with gray hair and a pair of glasses. In her mind appeared Joyce, her mother. When Amy was a little girl, she got her first doll from Joyce for her birthday. Then the second, the third...A doll a year from Joyce never arrived late. "Why always a doll?" This question had been in Amy's mind until one day her father gave the answer, Little Joyce dreamed to have a doll. Her parents promised one for her fifth birthday. Sadly, they both died in a traffic accident before it arrived. The never-received gift was the most _ in her eyes. Her mother's story being recalled , Amy got an idea. It was Joyce's 60th birthday. A package was delivered to her, with a card that read: Dear Joyce, I forget to send you the package that you should have received on May 20, 1956, your fifth birthday. The gift inside has aged, but I felt that you might still wish to have it. Angel of Joy Joyce opened the package and saw a lovely grandma doll. She held the doll that she had waited for so many years, with tears running down her face. The doll, given by "Angel of Joy", made her the happiest "child" in the world. Question: Why did Joyce often buy a doll for her as a birthday present every year? Options: A: Because Amy liked dolls. B: Because Amy's mother Joyce liked dolls. C: Because the dolls made Joyce think of the never-received gift given by her parents. D: Because Joyce's parents liked dolls.
C