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Câu hỏi: Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.
They were playing in the garden _______________.
A. When they have heard a scream
B. When they were hearing a scream
C. When they heard a scream
D. When they had heard a scream
They were playing in the garden _______________.
A. When they have heard a scream
B. When they were hearing a scream
C. When they heard a scream
D. When they had heard a scream
Kiến thức mệnh trạng ngữ chỉ thời gian
Đáp án C.