_______ is a mystery. A. Why isn’t he here today B. Why isn’t he here today? C. Why he isn’t here today D. Why he isn’t here today?

_______ is a mystery.

A. Why isn’t he here today     
B. Why isn’t he here today?
C. Why he isn’t here today           
D. Why he isn’t here today?

Trả lời

Chọn đáp án C

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