An increased number of city dwellers has made the obsolete infrastructure worse and required a lot of repairs in these days.

Câu hỏi :

An increased number of city dwellers has made the obsolete infrastructure worse and required a lot of repairs in these days.

A obsolete infrastructure             

B  has made

C required                                                               

D repairs

* Đáp án

B

* Hướng dẫn giải

Phương pháp giải:

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