There ought to be less anxiety over the perceived risk of getting cancer than ______ in the public mind today.

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问题 There ought to be less anxiety over the perceived risk of getting cancer than ______ in the public mind today.

选项 A、exists
B、exist
C、existing
D、existed

答案A

解析 状语从句。此处考查比较状语从句中的省问题,than或者as引导的比较状语从句中和主句重复的部分可以省,所以空格后的比较状语从句其实省了主语anxiety。
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