PRACTICE TEST 4- Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân

John _______ all day before he down to eat something. A. had been working / sat B. will have worked / has sat C. is working / sits D. has worked / will sit

13/100

John _______ all day before he    down to eat something.

had been working / sat

will have worked / has sat

is working / sits

has worked / will sit

Giải thích

Chọn đáp án A