選出可以替換劃線部分的最佳選項．
- The dust in the air is tiny， so we can't see it easily．
-Yes， I always wear a face mask （口罩）．

A．very clean

B．very dirty

C．very small

【答案】C

【解答】

【點評】

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發(fā)布：2024/5/27 14:0:0組卷：13引用：1難度：0.6

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選出可以替換劃線部分的最佳選項．- The dust in the air is tiny， so we can't see it easily．-Yes， I always wear a face mask （口罩）．