How long (learn / she)_________ English before she went to London?
A. has she learned
B. had she been learning
C. had she learned
D. she learned
Giải bởi qa.haylamdo.com
Dấu hiệu: before she went =>mệnh đề phía trước “before” diễn tả một sự việc xảy ra trước một thời điểm trong quá khứ nên ta sử dụng thì quá khứ hoàn thành
Cấu trúc: Wh-word + had + S + Vp2?
=>How long had she learned English before she went to London?
Tạm dịch: Cô ấy đã học tiếng Anh bao lâu trước khi đến London?
Đáp án cần chọn là: C
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