—You were out when I dropped in at your house. —Oh, I ________ for a friend from England at the airport. 
#104756
A
was waiting
B
had waited
C
am waiting
D
has waited
推荐题目
When I was at school, I _____ up very late, reading storybooks.
#102944
A
used to stay
B
was used to stay
C
used to staying
D
am used to staying