What is the meaning of 'back up'? A. reverse B. advance C. block D. support

Câu hỏi :

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

A. reverse   

B. advance       

C. block 

D. support

* Đáp án

* Hướng dẫn giải

Đáp án là D

Back up = support: ủng hộ

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