One of the most urgent environmental problems in the world today is the shortage of

Câu hỏi :

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks.

A. away

B. of 

C. on

D. off

* Đáp án

* Hướng dẫn giải

Đáp án : D

Ta có cụm từ “off shore”: xa bờ

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