30 đề thi thử đề thi thử THPTQG môn Tiếng Anh có lời giải chi tiết (Đề số 22)

Before she moved here, Arlene had been president of the organization

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Before she moved here, Arlene had been president of the organization since four years.

Before she moved

had been

presidentof

since

Giải thích

     Đáp án là D. since => for, for + khoảng thời gian, còn since + mốc thời gian