23. We have taken all the ____ we can against the painting being stolen.
A. precautions B. admissions C. concessions D. transactions
precaution 预防措施,警惕
caution 警告
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23. We have taken all the ____ we can against the painting being stolen.
A. precautions B. admissions C. concessions D. transactions
precaution 预防措施,警惕
caution 警告