Not until now.................popularly recognized that man is destroying the environment.

Câu hỏi :

Not until now.................popularly recognized that man is destroying the environment.

A. has it become

B. does it become

C. it has become

D. it becomes

* Đáp án

A

* Hướng dẫn giải

Dùng dạng đảo ngữ của thì HTHT khi có "Not until now" đứng đầu câu

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