题目内容
—I have been waiting for you so long.
—Sorry, I have been in the library, _______ my friend look for some books.
- A.helped
- B.helping
- C.to help
- D.help
B
考察非谓语动词,根据句子结构可知,此处为状语,help的逻辑主语是I,help与逻辑主语I之间是主动关系,即选择B。
考察非谓语动词,根据句子结构可知,此处为状语,help的逻辑主语是I,help与逻辑主语I之间是主动关系,即选择B。
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