◎ 题干
You can imagine what great trouble they have________the problem________.
[      ]
A. to solve; being talked about
B. solving; discussing
C. to solve; to talk about
D. solving; being discussed
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“You can imagine what great trouble they have________the problem________. [ ]A. to solve; being talked aboutB. solving; discussingC. to solve; to talk abou…”主要考查了你对  【现在分词的被动式】【动名词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。