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Câu hỏi:
The protection of technologies and technological information has become ............. for many nations.
- A. The importance of a concern
- B. A concern of important
- C. The importance concerning
- D. An important concern
Lời giải tham khảo:
Đáp án đúng: D
An important concern: một mối bận tâm quan trọng
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