—It seems that his health is improving.

—Yes. It is ten years ___ he _____.

A. that, smoked     B. after, didn’t smoke       C. since, smoked     D. before, smoked

C


解析:

在It’s--------since-----句中，若動詞為延續(xù)性動詞，則表示其動詞的反義概念。It’s 10 years since he smoked.表示他已戒煙十年了。等于It’s 10 years since he gave up smoking. 故選C。

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