题目内容
Mr. Smith is in good health now for it is quite a long time since he __________.
A. not smoked B. gave up smoking
C. has smoked D. began to smoke
答案:B
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题目内容
Mr. Smith is in good health now for it is quite a long time since he __________.
A. not smoked B. gave up smoking
C. has smoked D. began to smoke