问题
选择题
She was leaning against a tree as if ______ for someone.
A．waited
B．wait
C．to wait
D．waiting
答案
答案：D
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。