CÂU 680. WE SPENT HALF A YEAR ... THIS HOTEL. A. TO BUILD B. BUILT C....

TẬP HỢP CÂU HỎI TNKQ CÁC MÔN THI KHẢO SÁT KHỐI 9

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754. How is the air in many of the world’s cities?

A. It is very pure B. There is so much smoke in it.

C. It is healthy for people to breathe. D. All of them are incorrect.