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题目
()the experiment that he gave up.
ASo much trouble did he have doing 选A
CSo much trouble did he have to do
为什么?

提问时间:2020-10-23

答案
把句子的顺序调整过来就是
He had so much trouble doing the experiment that he gave up.
句子的结构以及运用的短语就很明显了.
have trouble in doing sth.做某事有困难或很麻烦
其中in可以省略.
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