The sentence was so hard to understand that I had to have my teacher to explain it to me.

发布时间：2020-08-17 13:32:16

The sentence was so hard to understand that I had to have my teacher to explain it to me.
A                 B         C               DD  to explain---explain 

网友回答

(答案→)D  to explain---explain 
解析：固定搭配：have sb. do sth.
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