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  3. A survey of the opinions of students________that they admit several hours of continuously sitting in front of the computer______

A survey of the opinions of students________that they admit several hours of continuously sitting in front of the computer______

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问题 A survey of the opinions of students________that they admit several hours of continuously sitting in front of the computer________harmful to health.
选项 A、show; are
B、shows; is
C、show; is
D、shows; are
答案B
解析 分析句子结构可知，主句中主语部分的中心词是survey，是可数名词单数，所以主句的谓语动词应用单数形式shows。admit后面是一个省略了引导词that的宾语从句，从句的主语是several hours of continuously sitting In front of the computer，中心词hours是表示时间的复数名词，在此处表示整体概念，所以admit后面的宾语从句的谓语动词应用单数形式is。故选B。
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