Now that the sign reads, “No person ______ smoke here”, please choose a seat in the smoking area over there if you _______ smoke.

A．must; shall B．will; must C．shall; must D．can; should

C

解析試題分析：句意：既然牌子上寫著：這里不允許抽煙，如果你想抽煙就請到那邊的吸煙區(qū)吧。must表示主觀上必須；will是將會；should應(yīng)該；can能、會；shall通常表示將要，這里表示規(guī)則規(guī)定的內(nèi)容。故選C。
考點: 考查情態(tài)動詞的用法。

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