They did the in the classroom yesterday.39. Fanners shouldn’t use too many .They are not good for us. 题目和参考答案——青夏教育精英家教网—

题目内容

38. They did the (实验) in the classroom yesterday.

39. Fanners shouldn’t use too many (化学品) .They are not good for us.

38. experiment 39. chemicals

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