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Câu hỏi:
They are quite safe ____ the experimental test of the new method.
- A. on
- B. against
- C. within
- D. from
Lời giải tham khảo:
Đáp án đúng: D
They are quite safe from the experimental test of the new method.
Dịch: Chúng khá an toàn trước thử nghiệm thực nghiệm của phương pháp mới.
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