PRACTICE TEST 12- Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân
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Some students left the room _______ A. before the class was over B. after the class would be over C. the class was over D. while the class is being over

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Some students left the room _______

before the class was over

after the class would be over

the class was over

while the class is being over

Giải thích

Chọn đáp án A