You can't imagine the difficulty they had [ ] the problem.It isn'_英语解答

You can't imagine the difficulty they had [ ] the problem.It isn't [ ] easy.
A.to solve; so
B.solved; so
C.solving; that
D.solved; that
为什么?

人气：281 ℃　时间：2020-01-30 00:16:53

解答

have difficulty (in) doing something,固定搭配,只能选C
that,作“那么”解
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