A survey of the opinions of experts____that three hours of out door exercise a week___good
问题描述：
A survey of the opinions of experts____that three hours of out door exercise a week___good
for one's health.
A.show;are B.shows;is C.show;is D.shows are
为什么第一个空格的主语是a survey 单数,所以show加s?
答
这个句子,划分句子成分最好理
【A survey主语】 【of the opinions of experts介词短语,定语】【shows】that 【three hours of out door 定语 】 【exercise主语】【 a week定语】【_is_】【good】
提取出关键成分就是：
【A survey主语】【shows】that 【exercise主语】【is_】【good】.
考查【主谓一致】,关键在于【找准主语】：划分句子结构,去掉修饰成分,注意句子连接关系等都是有效的方法.
汉语中有此表达：删繁就简三秋树,领异标新二月花.这里的【删繁就简】思路,相当值得借鉴.