MODULE 17- Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân
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______ my mother was cooking in the kitchen, my father was working in the garden. A. after B. as C. when D. since

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______ my mother was cooking in the kitchen, my father was working in the garden.

after

as

when

since

Giải thích

Chọn đáp án A