500 Câu trắc nghiệm từ vựng Tiếng Anh có đáp án - Phần 7
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Since his retirement, Peter Smith, who was ______ a teacher, has written four novels

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Since his retirement, Peter Smith, who was ______ a teacher, has written four novels.

afterwards

usually

presently

formerly

Giải thích

Chọn đáp án D

Formerly: trước kia