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  3. A survey of the opinions of students______that they also admit several hours of sitting in front of the computer______harmful fo

A survey of the opinions of students______that they also admit several hours of sitting in front of the computer______harmful fo

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问题 A survey of the opinions of students______that they also admit several hours of sitting in front of the computer______harmful for one’ s health.
选项 A、show: are
B、shows: is
C、show: is
D、shows: are
答案B
解析 主句的中心词是a survey，所以谓语动词应用单数形式shows。admit后面是省略了that的宾语从句，从句的主语是several hours of sitting in front of the computer，其中several hours是中心词，是表示时间的复数名词，被看作整体，作主语时，谓语动词应用单数形式，即is。故选B。
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