◎ 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 aboutD.…”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。