Some underground water is enough safe to drink, but all the surface water must be treated.

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. Some 

B. enough safe

C. but 

D. must be treated.

* Đáp án

* Hướng dẫn giải

Đáp án : B

Tính từ đứng trước “enough”. S + be + adj + enough + (for somebody) to V = …đủ… để (ai đó) làm gì. B: safe enough

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