200+ câu trắc nghiệm Tiếng Anh Du lịch và Khách sạn có đáp án - Phần 4

Choose the correct word for the following definition: To watch and check a situation carefully for a period of time in order to discover something about it

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Choose the correct word for the following definition:

To watch and check a situation carefully for a period of time in order to discover something about it

monitor

improve

develop

market

Giải thích

Chọn đáp án A.