Dont you think it necessary pay back the money you borrowed when you paid for the A B C

发布时间：2020-08-17 13:32:28

Don't you think it necessary pay back the money you borrowed when you paid for the
A            B                   C              D
education?B  pay back---to pay back 

网友回答

(答案→)B  pay back---to pay back 
解析：to pay back 这是不定式，做真正的主语。
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