Câu hỏi:
17/06/2026 151Mark the letter A, B C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions
While the teacher was explaining the some on the blackboard, the children threw paper aeroplanes around the classroom
A. around
B. threw
C. on the
D. was explaining
Trả lời:
Giải bởi Vietjack
Đáp án B
Sử dụng thì QKTD để diễn tả hai hành động đang xảy ra song song cùng lúc trong quá khứ, thường đi kèm với trạng từ while (trong khi).
Cấu trúc: S1 + was/were + V1-ing + while + S2 + was/were + V2-ing.
→ Sửa ‘threw’ thành ‘were throwing’.
Dịch nghĩa: Trong khi giáo viên đang giải thích một vài trên bảng đen, bọn trẻ đang ném máy bay giấy khắp lớp học.
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