【題目】Visitors________not to touch the exhibits.

A．will request

B．request

C．a(chǎn)re requesting

D．a(chǎn)re requested

【答案】D

【解析】本題考查的是被動(dòng)語態(tài)以及request的用法。句意為“參觀者被要求禁止觸摸展品”，request是及物動(dòng)詞，根據(jù)句子的意思“游客被要求……”可知要用被動(dòng)語態(tài)，故答案應(yīng)選D項(xiàng)。

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