(Viên chức Mầm non) bài tập tiếng Anh theo chủ đề có đáp án - Test 1

While her brother was in the army, Sarah _________to him twice a week.

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While her brother was in the army, Sarah _________to him twice a week.

was writing

wrote

has written

had written

Giải thích

Đáp án đúng là b