MODULE 21- Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân
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________, he has become very skillful in the trade. A. Being train for two years B. Been trained for two years C. After having trained for two years D. After having been trained for two ye

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________, he has become very skillful in the trade.

Being train for two years

Been trained for two years

After having trained for two years

After having been trained for two years

Giải thích

Chọn đáp án D