A survey of the opinions of students——that they also admit several hours of sitting in front of the computer————harmful
问题描述：
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
A.show；are B.shows；is C.show；is D.shows；are
reason?
答
选B啊.
A survey 是真正的主语,因此用 shows ,that 后面一直到computer的是修饰survey 的从句,不要理会它.再来就是一个简单的词组 be harmful for ,再次回到 A survey这个主语,因为是单数,所以用is但我想到the number of 后接V单数而 a number of 后接V复数 这里不能用这点吗？the number of 后加V单，a number of 后加V复，这个固定的搭配。找到句子中真正的主谓宾才是关键啊。A survey 不是表泛指吗？再怎么泛指，它也有个A啊，很明显了是单数啊。