单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．Warmer clothes.
B．More aggressive clothes.
C．Clothes of brighter colors.
D．More casual clothes.
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填空题
People do not analyze every problem they meet. Sometimes they try to remember a (36) from the last time they had a similar problem. They often accept the (37) or ideas of other people. Other times they begin to act without thinking; they try to find a solution by (38) and error. However, when all these (39) fail, the person with a problem has to start analyzing. There are six (40) in analyzing a problem. First, the person must recognize that there is a problem. For example, Sam’s bicycle is broken, and he cannot ride it to class as he usually does. Sam must see that there is a problem with his bicycle. Next, the thinker must (41) the problem. Before Sam can repair his bicycle, he must find the reason why it does not work. For instance, he must (42) if the problem is with the gears, the brakes, or the (43) . He must take his problem more specific. (44) . For instance, suppose Sam decided that his bike does not work because there is something wrong with the gear wheels. (45) . He can talk to his friends at the bike shop. He can look at his gears carefully. (46) . Take Sam as an illustration. His suggestions might be: put oil on the gear wheels; buy new gear wheels and replace the old ones; tighten or loosen the gear wheels.
单项选择题
A．Lack of water.B．The pollution.C．Dams and other water projects.D．The enforcement of laws regarding wildlife.
A．Lack of water.
B．The pollution.
C．Dams and other water projects.
D．The enforcement of laws regarding wildlife.
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