Choose the best answer.I can hear a cat __________ at the window.
A. Scratches
B. to scratch
C. scratching
D. was scratching
Đáp án: C
Gải thích: hear + O + V: nghe thấy toàn bộ hành động, toàn bộ sự việc diễn ra từ đầu đến cuối
hear + O + V-ing: nghe thấy việc gì đang diễn ra rồi chứ không rõ cả quá trình
=> I can hear a cat scratching at the window.
Tạm dịch: Tôi có thể nghe thấy tiếng mèo cào ngoài cửa sổ.
Đáp án cần chọn là: C
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