[题目]Be careful about these chemical.For they might be poisonous. 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】Be careful about these chemical(物质），For they might be poisonous.

【答案】substances
【解析】句意：小心这些化学物质，因为他们可能有毒。These修饰复数名词名词，故填substances 。

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