Half of the workers here _____ under 30 _____.　A.is/years B.are/year oldHalf of the workers here _____ under 30 _____.　A.is/years B.are/year old　C.is/years old D.are/years of age为什么是D

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Half of the workers here _____ under 30 _____.　A.is/years B.are/year oldHalf of the workers here _____ under 30 _____.　A.is/years B.are/year old　C.is/years old D.are/years of age为什么是D
Half of the workers here _____ under 30 _____.　A.is/years B.are/year old
Half of the workers here _____ under 30 _____.　A.is/years B.are/year old　C.is/years old D.are/years of age
为什么是D

Half of the workers here _____ under 30 _____.　A.is/years B.are/year oldHalf of the workers here _____ under 30 _____.　A.is/years B.are/year old　C.is/years old D.are/years of age为什么是D
第一个空：因为主语是workers,是复数,所以应该用are
第二个空：年龄的表达方式只有3种,一个是i'm xx.一种是i'm xx years old,最后一种是i'm xx years of age.

第一空 前边是半数的工人表示复数肯定用are没有问题撒 排除A C
第二空 year是可数名词 所以要用years 排除B
D项表达正确

首先第一个空，主语是workers，复数，所以用are，不用is，第二个空，30岁的30，也是复数，所以year后面得有s.

这是一个侧重问题。整句翻译是：这里一半的工人都在30岁以下。强调的是这一半的工人（主语）里每个人都是30以下，有一半的人，就用复数啦！至于后面，30years of age=30 years old，这个就不用我多说啦~希望我的解说您能明白~

Half of the workers here are under twenty __B__ A.years old B.years of age 为什么选B the role of migrant workers half of the 英语类 英数题A team is going to buiid a road.54 workers covered1944 meters in 12 days. lf 18 workers are added, and the time is reduced to a half of before. how long can they build?(suanshi) The workers also cleaned all of them. the other half of me the half of my life Half of the apples ____good. half the class 与half of the class的区别 half the sky half of the sky区别 half the books还是half of the books? The dream of you AND half of one fourth of workers还是one fourth of the workers哪个对,为什么 Half of the workers here _____ under 30 _____.　A.is/years B.are/year oldHalf of the workers here _____ under 30 _____.　A.is/years B.are/year old　C.is/years old D.are/years of age为什么是D Half of the time to pursue the half students和half of the students有什么区别 The population of the workers ___200.is 还是are. Many of the workers were at the meeting.