no wonder that they had so much trouble.A. This is B. That isC. It is D. There is

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【题目】________ no wonder that they had so much trouble.

A. This is B. That is

C. It is D. There is

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【答案】C

【解析】

考查主语从句。句意：难怪他们有这么多麻烦。分析句子可知，本句是主语从句，it是形式主语，真正的主语是that they had so much trouble。从句表示的“他们有那么多的麻烦”不惊讶。故选C项。