PRACTICE TEST 9- Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân

______ when the earthquake ______ last week? A. What did you do / would start B. What had you done / has started C. What have you done / starts D. What were you doing / started

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______ when the earthquake ______ last week?

What did you do / would start

What had you done / has started

What have you done / starts

What were you doing / started

Giải thích

Chọn đáp án D