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Câu hỏi:
It has become necessary ________ water in the metropolitan area because of the severe drought.
- A. rationing
- B. ration
- C. to ration
- D. to have rationed
Lời giải tham khảo:
Đáp án đúng: C
Sau tính từ thường sử dụng động từ nguyên mẫu có "to"
Đáp án C đúng
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