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高考英语:Over 80 percent of the population___workers.A .will be

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高考英语:Over 80 percent of the population___workers.A .will be B.are
1.Over 80 percent of the population___workers.
A .will be B.are C.is D.was
2.The manager or his assistant __planning to go.
A.was B.were C.be D.will
3.The news at six o'clock ___not true .Those pieces of news___to be broadcasted.
A.are;is B.are;are C.is;are D.is ;is
请说明....
1,B。顺便给你看下这个词的用法,这个题看第二条。
一、population常与定冠词the连用,作主语用时,谓语动词常用第三人称单数形式。
例如: The world\'s population is increasing faster and faster. 全世界的人口增长得越来越快.
二、当主语是表示人口百分之几时,谓语用复数。
例如:About seventy percent of the population in China are farmers. 中国大约有百分之七十的人口是农民。
三、有时population可用做可数名词,可以和冠词连用。
例如:China has a population of about 1.3 million.
there is a population of 1.3 million in china.
在表示多个地区的人口时,population 要用复数。
例如:many parts of world , which one had large populations and produced plenty of crops,have become deserts.
四、在修饰population时,人口多要用large,人口少用small。
2,A,or 就近原则,先不管时态,他的助手,符合第三人称单数的就was了
3,C。这里news是不可数名词,前面一个是特指的那个新闻,单数就可以,后面those pieces是那几则,有数量词修饰,用复数形式are