PRACTICE TEST 1- Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân
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______ is a mystery. I wish that I could ask him. A. How did it B. What he did it C. How he did it D. When did it

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______ is a mystery. I wish that I could ask him.

How did it

What he did it

How he did it

When did it

Giải thích

Chọn đáp án C