The living conditions in the rural areas of the country ______ during the past five years.

Câu hỏi :

The living conditions in the rural areas of the country ______ during the past five years.

A had been improved

B have been improved

C had improved

D were improved

* Đáp án

B

* Hướng dẫn giải

Phương pháp giải:

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