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Câu hỏi:
We/ survive/ unless/ start/ work/ cleaner/ safer/ sources/ energy.
- A. We won't survive unless we start working cleaner, safer sources of energy.
- B. We won't survive unless we start work on cleaner, safer sources of energy.
- C. We will survive unless we start to work cleaner, safer sources of energy.
- D. We won't survive unless we start working on cleaner, safer sources of energy.
Lời giải tham khảo:
Đáp án đúng: D
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