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Câu hỏi:
Choose A, B, C, or D to indicate the correct answer to each of the following questions: ____ his homework, he started to surf the social networks.
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A.
At the time he finished
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B.
After he has finished
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C.
After he had finished
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D.
By the time he finishes
Lời giải tham khảo:
Đáp án đúng: C
Giải thích:
Vì mệnh đề chính chia ở quá khứ đơn, nên mệnh đề phụ chia ở quá khứ ⇒ Loại B, D
At the time + quá khứ, S + Vqua khứ tiếp diễn ⇒ Sai ⇒ Loại A
Chọn C
Hãy trả lời câu hỏi trước khi xem đáp án và lời giải -
A.
Câu hỏi này thuộc đề thi trắc nghiệm dưới đây, bấm vào Bắt đầu thi để làm toàn bài
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