Directions: In Part C, you will hear two short passages, and you will be asked three questions on each of the passages. The passages will be read twice but the questions will only be spoken once. When you hear a question, read the four possible answers in your paper and decide which one would be the best answer to the question you have heard.
Questions 15 through 17 are based on the following passage.
15.
A. Because Steven was doing very poorly in school.
B. Because Steven was neglecting his studies.
C. Because watching too much TV would hurt his eyes.
D. Because they wanted Steven to earn some money.
正确答案是
16.
A. '400.
B. '500.
C. '600.
D. '700.
正确答案是
17.
A. Watch his favorite TV program.
B. Put his money in the bank.
C. Go and buy a computer.
D. Go and play video games.
正确答案是
Questions 18 through 20 are based on the following passage.
18.
A. They are thirsty now.
B. They drink a lot of water.
C. They lack fresh water.
D. They have enough fresh water.
正确答案是
19.
A. By using rainwater.
B. By taking steps.
C. By using sea water.
D. By using underground water.
正确答案是
20.
A. With chemicals.
B. By using salt.
C. By removing the salt.
D. By heating it.
正确答案是