The word “microbes” in paragrahp 3 could be best replaced by which of the following ? A. Rays of light   B. Pieces of dust    C. Tiny bubbles   D. Tiny organisms

The word “microbes” in paragrahp 3 could be best replaced by which of the following ?
A. Rays of light
B. Pieces of dust
C. Tiny bubbles
D. Tiny organisms

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Đáp án D

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