As they were walking around, they noticed a man _______ against a tree.

A. sit B. to sit C. sitting D. sat

 

C

【解析】

試題分析:句意：當四下走動的時候，他們注意到一個人在倚著樹坐著。此處是非謂語短語做補語，感官動詞后不能跟to do做補語，故排除BD選項； Notice sb do sth意思是“看到某人做某事了”表示看到動作的整個過程，而notice sb doing sth 意思是“看到某人在做某事”，表示正在進行的動作，根據(jù)句意可知選C。類似動詞還有see 、hear、observe等。

考點：考查非謂語動詞。

 

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