Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. (A) I think you have asked me five (B) or six questions since we (C) have begun (D) this exercise. A.I think B. or C. have begun...
Đọc tiếp
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
(A) I think you have asked me five (B) or six questions since we (C) have begun (D) this exercise.
A.I think
B. or
C. have begun
D. this
Chọn C
Have begun => began (trong thì hiện tại hoàn thành mệnh đề đi với since ở thì quá khứ)
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