I was sleeping soundly last night when I was awakened by someone's groans .I listened , and heard it was from Sam,a student from Africa. I really wanted to go on sleeping, as I had insomnia and had just fallen asleep, but I couldn't because Sam groaned louder and louder,showing he was seriously ill. At that time , Robbie,a student from China , also got up to help. We found some pills,got some water , and helped him sit up to take them, hoping this would make his pain go down a little and get over the difficult time. If only daytime would come soon, everything would become easier. Things went contrary)to our wishes. Sam's condition developed from bad to worse. We telephoned the emergency service , and in no time an ambulance stopped in front of our gate. We helped the medical workers carry Sam to the vehicle,and then both Robbie and I got in and took Sam to the hospital. We helped him go through many medical examinations. After all kinds of tests,we were told that the final diagnosis was appendicitis . Luckily , Sam didn't need an operation because we brought him to the hospital in time. He got timely treatment. After Sam felt much better , we rushed back to prepare ourselves for the class. We were a little tired , but we had certainly done something good,something right. Why couldn't the writer go on sleeping that night? A) Because he was too excited that day. B) Because his roommates were watching football games on TV. C) Because one of his roommates was sick and groaning. D) Because he was sick.
D

We've talked about snails and their slow move. But much of the time snails don't move at all. They are in their shells --sleeping. Hot sun will dry out a snail's body. So at the least sign of hot sun, a snail draws its body into his shell. A snail will die in a heavy rain. So when it rains, a snail does the same thing, too. A snail can sleep for as long as it needs to. It spends all the winter months in its shell, asleep. In the spring the snail wakes up. Its body, about three inches long, comes out from the shell. When hungry, the snail looks for food. Its eyes, at the end of the top feelers, are very weak. But its sense of smell is very strong. It helps the snail to find food and the new greens. A snail's mouth is no bigger than the point of a pin. Yet it has 256,000 teeth! The teeth are very small, and you can't see them. If you put a snail in a hard paper box, it will eat its way out! And if a snail wears out its teeth, it will grow new ones. A snail goes to sleep when _ . A) it feels hungry B) it is put into a paper box C) spring is coming D) it rains heavily
D

Do you have a good memory? Maybe you remember better than all of your friends. But even if you have a short-term memory, it's better than a chimpanzee's , right? Well, you may be wrong. Tetsuro Matszawa, a scientist from Kyoto University, Japan has showed how chimps have far better memories than humans. "We learn that chimps have great memories by doing tests," he told The Guardian "You can do things to improve your memory." How do chimps have better memories than us? Scientists tested four chimps and human volunteers. They showed them five numbers on a computer screen. Chimps and human volunteers had to remember the numbers correctly. But to make it hard, the numbers disappeared after seven tenths of a second. Then they will reduce the time to two tenths of a second. While humans began to make mistake after mistake, the young chimps still did very well. Why do they have better memories? We share 98.8 percent of our DNA with chimps. But during evolution , we lost some of our shared abilities. As humans learned new skills, like language, we had to lose some of our memory skills to make room in our brains. "To get something, we had to lose something," said the scientist. Chimps need good memories to survive . When a chimp looks up at the big tree and pick a banana, he must remember where he saw it as he fights off competition from other animals. What did the scientist's study find? A) Chimps can remember all of their friends. B) Chimps have better memories than humans. C) Chimps do things to improve their memories. D) Chimps can do many things better than humans.
B