It is a good idea (B) to be careful in buying (C) or purchasing magazines (D) from salespersons who may come to your door.

Câu hỏi :

It is a good idea (B) to be careful in buying (C) or purchasing magazines (D) from salespersons who may come to your door.

A. It is

B. to be

C. or purchasing

D. from salespersons

* Đáp án

C

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