【題目】No one is permitted __________ the room until the chairman declares the end of the conference.

A. leave

B. to leave

C. leaving

D. left

【答案】B

【解析】句意：在主席宣布會(huì)議結(jié)束之前任何人不允許離開(kāi)房間。be permitted to do sth允許做某事，選B。

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