单选题：Ever since the first nuclear power stations were built, doub

题目内容：

Ever since the first nuclear power stations were built, doubts have（　）about their safety. A．preserved
B．survived
C．suspended
D．lingered

参考答案：

答案解析：

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分类：英语六级题型：单选题

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分类：英语六级题型：单选题