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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.
One of the men was lying on the ground after____________down by a piece of rock.
A. knocked
B. being knocked
C. knocking
D. was knocked
One of the men was lying on the ground after____________down by a piece of rock.
A. knocked
B. being knocked
C. knocking
D. was knocked
Động từ "knock" được sử dụng ở thể bị động cho phù hợp về mặt nghĩa
After + V_ing
After + V_ing
Đáp án B.