The doctor took off the plaster that he (put on)_________ six weeks before.
A. has put on
B. had put on
C. had been putting on
D. has been putting on
Giải bởi qa.haylamdo.com
Dấu hiệu: six weeks before, The doctor took off ->hành động sau put on xảy ra trước hành động took off trong quá khứ. Như vậy, ta phải chia thì quá khứ hoàn thành với sự việc xảy ra trước.
Cấu trúc: S + had Vp2
=>The doctor took off the plaster that he had put on six weeks before.
Tạm dịch: Bác sĩ đã tháo lớp thạch cao mà anh ta đã đặt vào sáu tuần trước đó.
Đáp án cần chọn là: B
He (drive) __________less than an hour when he ran out of petrol.
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I ______ my document before the power went out in the computer lab.
One of the parents _____________ the children's song this time last year.
How long (learn / she)_________ English before she went to London?
Marry _________ her housework already by the time Peter came over.
