So difficult ____that no one could ___ a good solution to it.
#90783
A
was the problem; come up with
B
the problem was; come up with
C
the problem was; put up with
D
was the problem; put up with
推荐题目
I remember___for the job,but I forget the exact amount.
#97397
A
to be paid
B
being paid
C
to paid
D
paying
 I'll have you _______ English in six months .
#98037
A
speaking
B
speak
C
spoken
D
be able to speak
_____ his homework in time, he had to stay up late into the night.
#96129
A
Finishing
B
Having finished
C
To finish
D
To have finished