题目内容
Dan shows an interest in musical instruments and is often heard _____ the guitar.
A. play B. played C. playing D. to play
D 【解析】句意:丹对乐器很感兴趣,经常听吉他演奏。考查动词形式辨析题。hear sb. do表示听到了动作的全过程,hear sb. doing表示听到动作正在进行或反复。本句听到的不是正在进行的动作,需用hear him play the guitar;但本句and后面是被动语态,原来省略to的不定式需恢复to,即be heard to do;根据句意结构和语境,可知选D。
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