---You look unhappy, what’s happening, my son? ---I’m wondering how long it’ll be________ we come to China again. 
#92424
A
since
B
when
C
before
D
after
推荐题目
How very delightful ___ to suggest this!
#94581
A
it is you
B
it was for you
C
it is of you
D
it was you
— Why haven’t you asked her to come here?— She _______ an important experiment when I found her and she _______ it.
#92694
A
had done; didn’t finish
B
was doing; hasn’t finished
C
did; wouldn’t finish
D
did; hadn’t finished