In one class we had to do a research on the language used in business

Câu hỏi :

Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.

A. one class 

B. a research 

C. the language 

D. business

* Đáp án

A

* Hướng dẫn giải

Đáp án A

one class => one’s class

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