We found________ the problem.A it is difficult to solve B it difficult to answerA 应该选择哪一个呢?

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We found________ the problem.A it is difficult to solve B it difficult to answerA 应该选择哪一个呢?
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We found________ the problem.A it is difficult to solve B it difficult to answerA 应该选择哪一个呢?
We found________ the problem.A it is difficult to solve B it difficult to answer
A 应该选择哪一个呢?

We found________ the problem.A it is difficult to solve B it difficult to answerA 应该选择哪一个呢?
答案有问题.选B的话把is去掉.选A的话把answer改为solve.

应该选A。
problem应该用solve, 而不能用answer
希望能对你有帮助!

选A answer question 和solve problem 是固定的

选B。因为A中要把is改成was。
B对,it 做形式宾语,to answer the problem作真正的宾语。

A answer针对question

感觉都对啊