2. 外语
  3. All types of water pollution are (harm)______to the health of humans and animals.

All types of water pollution are (harm)______to the health of humans and animals.

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问题 All types of water pollution are (harm)______to the health of humans and animals.
选项
答案Harmful
解析 本题考查词性转换。be作为系动词，后需接形容词作表语，表状态。因此，空格处填harmful。
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