15000 bài tập tách từ đề thi thử môn Tiếng Anh có đáp án (Phần 1)

He single-handedly solved the problem for the company and was named Employee of the Month. A. easily B. lonely C. effectively D. by himself

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He single-handedly solved the problem for the company and was named Employee of the Month.

easily

lonely

effectively

by himself

Giải thích

Đáp án D