No other quality is more important for a scientist to acquire as to observe carefully

Câu hỏi :

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

A. No other 

B. for 

C. as 

D. carefully

* Đáp án

C

* Hướng dẫn giải

Đáp án C

as => than. Cấu trúc so sánh hơn: No other + N +.... than

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