Question

You can’t imagine what great trouble they have _____ the problem _____.

A. to solve; beingtalked about
B. solving; discussing

C. to solve; to talk about D. solving; being
discussed

Answer 1

D
You can’t imagine what great trouble they have _____ the problem _____.

你想象不出在这个正在讨论的问题中他们有多么大的困难

从句中第一个空考察have trouble doing sth，干某事有困难，这个用what构成感叹句作主句的宾语

第二个空现在分词被动形式表示正在被讨论 的

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Answer 2

选D 第一个空考查have trouble (in)doing 结构，第二个空考查过去分词的进行式作定语，表示“正在被讨论的（问题）”

Answer 3

You cant imagine what great trouble they have solving the problem being discussed.