题目内容
（请给出正确答案）
[单选题]
L ook at the sign on the wall. We don't allow （)in the library.
A.to smoke
B.smoke
C.smoking
D.smoked
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.to smoke
B.smoke
C.smoking
D.smoked
如果结果不匹配，请 联系老师 获取答案
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