The Safe Drinking Water Act requires that municipal tap water ______for more than 80 contaminants.

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问题 The Safe Drinking Water Act requires that municipal tap water ______for more than 80 contaminants.

选项 A、ought to be screened
B、be screened
C、need be screened
D、is to be screened

答案B

解析

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专业英语四级

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The Safe Drinking Water Act requires that municipal tap water ______for more than 80 contaminants.

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