Bộ 10 đề ôn thi học sinh giỏi Tiếng anh 9 năm 2023 có đáp án (Đề 2)

Colds are caused by viruses, so in the …………………..……… of a virus, you can't catch a cold.

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Colds are caused by viruses, so in the …………………..………of a virus, you can't catch a cold.

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Giải thích

Colds are caused by viruses, so in the absence of a virus, you can't catch a cold.