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?
正確答案： C
解析：男士說“最好是賣了它再買輛新車”，可判斷C（車該換了）為正確答案。C中的replaced即是sell it and buy a new car的同義替換。

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?
正確答案：C
解析：女士問為什么日本人平均（預期）壽命這么長，男士先說不清楚，后又猜測說：“那一定是因為他們的健康飲食的緣故”。C是原文diet的同義表達，故C正確。