问题补充:
--- I didn’t see you at the party yesterday. Why?
--- Because I for an important person from America at that time.
A. was waiting
B. is waiting
C. will wait
D. have waited
答案:
(答案→)A. was waiting
B. is waiting
C. will wait
D. have waited
解析:根据问句内容I didn’t see you at the party yesterday.说明问的是当时我做什么,应该用过去进行时,故选答案A