(C) What we know about certain diseases(A)  are still not sufficient to prevent them (D) from spreading easily (B) among the population.

Câu hỏi :

(C) What we know about certain diseases(A)  are still not sufficient to prevent them (D) from spreading easily (B) among the population.

A are

B among

C What we know about

D from

* Đáp án

A

* Hướng dẫn giải

Phương pháp giải:

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