one-third of the three apples后面是is 还是are

one-third of the three apples后面是is 还是are Three apples and one orange后面填is还是are? half of +n后面用is还是are one third of +n呢 one third of student are还是is girls? one of the boys 后面加is 还是are Only _______ of the workers are man A.one third B.three quar three tons of coal后面用is 还是are 英语主谓一致；THREE BOTTLES OF WATER后面是IS还是ARE? three-fourths of the surface of the earth ( ) sea 是is 还是are? one percent of 10 sheep 后面用is 还是are? one fifth of them后面跟is还是are 是The apples is in the bag.还是The apples are the bag.