We have been cooking for the party for four hours.
Chúng tôi đã nấu ăn cho bữa tiệc được 4 giờ.
A. Chúng tôi có 4 đầu bếp cho bữa tiệc.
B. Việc nấu ăn cho bữa tiệc sẽ được hoàn thành trong 4 giờ nữa.
C. Chúng tôi đã bắt đầu nấu ăn cho bữa tiệc vào 4 tiếng trước.
D. Chúng tôi đã không bắt đầu nấu ăn cho bữa tiệc cho đến 4 giờ.
Cấu trúc:
S + have/has been V-ing + for (time) = S + started V-ing + (time) ago
→ Chọn đáp án C
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