Of the three statements he has suggested __ the heating problem, I think the last one is the best. 
#89599
A
solving
B
to solve
C
to solving
D
solve
推荐题目
We worked all night, _____ for the coming procession. 
#98012
A
to prepare
B
preparing
C
prepared
D
was preparing
Could I have a cigarette? I seem_________.
#95362
A
to run out
B
to have run out
C
to have run out of
D
to have been run out