问题补充:
-You were not in when I came over to your house.
-Oh, I for a friend from England at the airport.
A. was waiting
B. had waited
C. am waiting
D. have waited
答案:
(答案→)A. was waiting
B. had waited
C. am waiting
D. have waited
解析:句意:--我到你家的时候你不在。--哦,我在机场等我从英国来的朋友。根据句意:等待朋友是和你到我家同时发生的,用过去进行时,所以选A。