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Many big cities are suffering from serious air pollution, ______ ? 

Many big cities are suffering from serious air pollution, ______ ?

Câu hỏi

Nhận biết

Many big cities are suffering from serious air pollution, ______ ? 


A.
don't they
B.
aren't they 
C.
are they 
D.
do they 
Đáp án đúng: B

Lời giải của Luyện Tập 365

- tag question: affirmative sentence, negative sentence? và ngược lại 

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