Men and women in the Peace Corps work with people in the developing countries to help them

Câu hỏi :

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

A. work 

B. developing 

C. improving     

D. living

* Đáp án

* Hướng dẫn giải

Đáp án là C

improving => (to) improve. Cấu trúc: help someone (to) do something

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