It is estimated that about three billion people A. trouble

Câu hỏi :

Read the following passage and mark the letter A, B, C or D to indicate the correct word that best fits each of the numbered blanks.

A. Trouble

B. Nuisance

C. Dangers

D. Problems

* Đáp án

* Hướng dẫn giải

Đáp án

D

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