Câu hỏi :

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

A. the members studied more carefully the problem

B. the problem was more carefully studied 

C. with more carefulness the problem could be studied 

D. the members study the problem more carefully

* Đáp án

D

* Hướng dẫn giải

Đáp án D

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