Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có đầy đủ đáp án (Đề 8)

According to paragraph 3, why hasn't  Marburg virus become a pandemic?       A. It is not a deadly disease.       B. It does not spread from person to person easily.       C. Doctors have p

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According to paragraph 3, why hasn't Marburg virus become a pandemic?

It is not a deadly disease.

It does not spread from person to person easily.

Doctors have prevented it from becoming a pandemic.

It kills people too quickly.

Giải thích

Đáp án: D