Bộ câu hỏi: Thì và sự phối thì (Phần 1) (Có đáp án)

My mother has prepared dinner in the kitchen

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My mother has prepared dinner in the kitchen ______ .

once I get home from the gym

before I got home from the gym

after I had got home from the gym

since I got home from the gym

Giải thích

Chọn D