A. The couple were involved in an accident.

B. The man had the car repaired.

C. Their car has to be replaced.

D. Their car was stolen and the man found it.

18.

A. Their outgoing personality.

B. Their work environment.

C. Their usual food and drink.

D. Their healthy lifestyle.

17.

W: Thank goodness, you're back. How is our car? Were you injured?

M: The mechanic said that the best thing would be to sell it and buy a new car. This car is totally dead.

Q: What do we know from the conversation?

正确答案： C

解析：男士说“最好是卖了它再买辆新车”，可判断C（车该换了）为正确答案。C中的replaced即是sell it and buy a new car的同义替换。

18.

W: Why do the Japanese have such a long life expectancy?

M: I don't understand. So many of them smoke, and they have a stressful work environment. It must be their healthy diet. Hey! Let's go out for sushi!

Q: What does the man suppose contributes to the Japanese long life expectancy?

正确答案：C

解析：女士问为什么日本人平均（预期）寿命这么长，男士先说不清楚，后又猜测说：“那一定是因为他们的健康饮食的缘故”。C是原文diet的同义表达，故C正确。