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C. Because there was less traffic at night. D. Because he could meet lots of people.32. The driver usually went to work ______. A. at 5:30 in the morning B. at 5:30 in the afternoon C. at 2:00 in the morning D. at 9:00 in the evening33. What did the woman take with her when she got into the taxi?A. Her dog. B. Her keys. C. Her friend. D. A policeman.34. How long did the driver waited for the woman? A. About two hours. B. Three hours. C. One hour. D. About half an hour.35. What do you think of the woman? A. She was clever. B. She was lazy. C. She was careless. D. She was kindhearted.BThere are several ways of testing the intelligence(智力) of animals. In one test, some scientists put three plates on the table. While the animal watched, they put food under one of the plates. Then they took the animal away. Some time later, they brought it back to see if it remembered which plate had the food. The idea is to find out how long an animal’s memory can last. The scientists would try showing the plate to the animal one hour later, or two hours later, or even a full day later. They found out that chimpanzees and elephants have the best memory, and are able to remember the correct plate for at least twenty hours. No other animal is close. Dogs e next, but they can only remember for nine hours.The scientists made a large maze(迷宮) and ran the chimpanzees and elephants through it. The maze was very difficult with many dead ends. It took the chimpanzees ten minutes to find their way out. The elephants needed half an hour. The test showed that chimpanzees are the cleverest animals. From this and other tests the scientists found out an animal’s intelligence depends on the size of its brain to the size of its body. The elephant’s brain is ten pounds, but that is only 1/600 of its body. A chimpanzee’s brain is about one pound, and it’s 1/120 of its body. So the chimpanzee has five times as much brain as the elephant has more brain. 36. The first test was made to test an animal’s ______. A. nose B. memory C. eyes D. patience37. This passage tells us elephants ______.A. are the cleverest animals B. are cleverer than chimpanzees C. have worse memories than dogs D. are less clever than chimpanzees38. Which of the following is TRUE? A. Scientists have found out the secret of the intelligence of animals.B. Dogs are less useful than elephants. C. Chimpanzees and elephants have better memories than people.D. The heavier an animal’s brain is, the cleverer it is. 39. If an animal’s body is 2100 pounds, and it has a 3pound brain, it is ______.