问题
选择题
---You were out when I went to your house this morning.
---Oh, I _______ for a friend from England at the airport.
A．was waiting
B．waited
C．am waiting
D．have waited
答案
答案：A
此题重点考查过去进行时态的基本构成和基本用法，was/were+动词的ing形式，表示在过去某一时间里正在进行的动作或存在的某种状态。