为什么选d?64.Thank you very much for the trouble you have had __

为什么选d?
64.Thank you very much for the trouble you have had __ my son with his lessons.
in helpB. to helpC. helpedD. helping
A20012yy 1年前 已收到1个回答 举报

gisscs 春芽

共回答了19个问题采纳率:84.2% 举报

这句子实际就是考了一个固定句式have trouble (in)doing sth.
这儿就是把trouble提前了.

1年前

8
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