There had been a rash of petty thefts in the hotel, and we were all warned to be _______. A. wary B. vigilant C. observant D. cautious

There had been a rash of petty thefts in the hotel, and we were all warned to be _______.

A. wary
B. vigilant
C. observant  
D. cautious

Trả lời

Chọn B

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