MODULE 9 - Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân
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While the doctor ________ Mr. Jones, his son ________ outside this morning. A. was examining / was waiting B. will be examining / are waiting C. had been examining / was waiting D. are exam

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While the doctor ________ Mr. Jones, his son ________ outside this morning.

was examining / was waiting

will be examining / are waiting

had been examining / was waiting

are examining / is going to wait

Giải thích

Chọn đáp án A