Dirty water must not be ______ with drinking water.

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问题 Dirty water must not be ______ with drinking water.

选项 A、joined
B、linked
C、mixed
D、combined

答案C

解析 本题测试词义辨析。join:参加;link:连接;mix:混合;combine:组合,合并。句子的意思是:“脏水不能和饮用水混合。”
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