问题
选择题
is a bad habit. People should give it up.
A. Smoke B. To smoke C. Smoking
答案
C
题目分析：句意:抽烟是一个坏习惯。人们应该放弃。本句中is前面缺少主语，所以应该用动名词作主语，即smoke的ing式。故选C。
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is a bad habit. People should give it up.
A. Smoke B. To smoke C. Smoking
C
题目分析：句意:抽烟是一个坏习惯。人们应该放弃。本句中is前面缺少主语，所以应该用动名词作主语，即smoke的ing式。故选C。