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.
Luckily, by the time we got there, the painting____________.
A. didn't sell
B. hadn't sold
C. wasn't sold
D. hadn't been sold
Luckily, by the time we got there, the painting____________.
A. didn't sell
B. hadn't sold
C. wasn't sold
D. hadn't been sold
Cấu trúc: by the time + S + V (past)..., S + had + pp
"Thật may mắn, trước khi chúng tôi đến đó, bức tranh vẫn chưa được bán."
"Thật may mắn, trước khi chúng tôi đến đó, bức tranh vẫn chưa được bán."
Đáp án D.