She was leaning against a tree as if for someone.A. waitedB. waitC. to waitD. waiting

问题补充：

She was leaning against a tree as if for someone.

A. waited

B. wait

C. to wait

D. waiting

答案：

A. waited

B. wait

C. to wait

(答案→)D. waiting

解析：考查状语从句的省略。当状语从句的主语和主句主语一致，并且含有系动词be时，可以把状语从句的主语和be动词省略。本句补充完整应是She was leaning against a tree as if she was waiting for someone.所以选D。