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
Time should be made a good use ____ our lessons well.
#98588
A
of to learn
B
of learning
C
to learn
D
to learning
Could you show me the TV set you’d like ________?
#95710
A
to have repaired
B
repairing it
C
to have it repaired
D
to repair it