Never______ such a difficult problem. It took me almost half an hour to work it out.
#80170
A
had I come across
B
I had come across
C
did I come across
D
I did come across
推荐题目
Two hours away from the tall buildings of New York         .
#82110
A
some of the world’s largest bears live
B
lives some of the world’s largest bears
C
do some of the world’s largest bears live
D
live some of the world’s largest bears
      and we’ll finish the work ahead of time.
#81981
A
An hour earlier
B
If we start an hour earlier
C
Starting an hour earlier
D
Started an hour earlier
_ __ with the size of the whole earth, the biggest ocean does not seem big at all.
#82431
A
Compare
B
When comparing
C
Comparing
D
When compared