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Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Hung has worked as a teaching assistant ______ .
A. before he went to university
B. when he was going to university
C. after he had gone to university
D. since he went to university
Hung has worked as a teaching assistant ______ .
A. before he went to university
B. when he was going to university
C. after he had gone to university
D. since he went to university
Giải thích:
Ta có: HTHT since QKĐ
Tạm dịch: Hùng đã làm trợ giảng từ khi anh ấy đi học đại học.
Ta có: HTHT since QKĐ
Tạm dịch: Hùng đã làm trợ giảng từ khi anh ấy đi học đại học.
Đáp án D.
