题目内容

【题目】Grandpa is getting old and he has trouble what others say to him.
A.hear
B.to hear
C.hearing
D.have heard

【答案】C
【解析】句意:爷爷老了,听别人对他讲的话有困难了。have trouble in doing sth,固定搭配in可以省略,意思是做某事有困难。故选C。

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