—It seems that his health is improving.
—Yes. It is ten years ___ he _____.
A．that, smokedB．a(chǎn)fter, didn’t smokeC．since, smokedD．before, smoked
C
在It’s--------since-----句中，若動(dòng)詞為延續(xù)性動(dòng)詞，則表示其動(dòng)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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