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Smoking, is a bad habit, is, however, popular. A. that B. which C. it D. though

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Smoking, is a bad habit, is, however, popular. A. that B. which C. it D. though

Smoking, _______ is a bad habit, is, however, popular.

A. that      B. which     C. it    D. though

试题答案

B

解析:

which is a bad habit 非限制性定语从句.