The girl sitting next to me on the plane was very nervous, for she            before.
#39482
A
hasn’t flown
B
hadn’t flown
C
didn’t fly
D
wasn’t flying
推荐题目
There are many people downstairs. What do you think _____? 
#40285
A
to happen
B
is happening
C
is happened
D
happened
Tom often makes his brother___but yesterday he was made___ by his brother.
#42374
A
cry; to cry
B
to cry; cry
C
cry; cry
D
to cry; to cry