.Look at the sign Sir. We don’t permit in the hall.A. smokeB. to smokeC. smokingD. to ha

问题补充：

.

Look at the sign, Sir. We don’t permit in the hall.

A. smoke

B. to smoke

C. smoking

D. to have a smoke

答案：

A. smoke

B. to smoke

(答案→)C. smoking

D. to have a smoke

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