After I ___________dinner, I visited my grandparents.
A. had
B. has had
C. had had
D. have
Giải bởi Vietjack
Dấu hiệu: After…, I visited (Sau khi…,) ->hành động sau After xảy ra trước hành động I visited trong quá khứ. Như vậy, ta phải chia thì quá khứ hoàn thành với sự việc xảy ra trước.
Cấu trúc: After S + had + Vp2, S + Vqkđ
=>After I had had dinner, I visited my grandparents.
Tạm dịch: Sau khi ăn tối xong, tôi đến thăm ông bà nội.
Đáp án cần chọn là: C
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How long (learn / she)_________ English before she went to London?
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I ______ my document before the power went out in the computer lab.
As soon as I shut the front door I realised that I………….my key in the house.
Marry _________ her housework already by the time Peter came over.
The doctor took off the plaster that he (put on)_________ six weeks before.
