Two fifths of the building was destroyed in the fire为什么用 was 而不用 were

Two fifths of the books are sold out 中文意思 ______ of the students took part in the reading contest yesterday afternoon.A.Two-fifth B.Two fifths C.Two fifth D.Two-fifths ______ of the land in that district ______ covered with trees and grassA.Two fifth; is B.Two fifth; areC.Two fifths; is D.Two fifths; are 为什么two fifths of the population后加are,而two fifths of the land后加is?不是population不可数的吗 Two fifths of the building was destroyed in the fire为什么 用 was 而不用 were Two fifths of the building was destroyed in the fire为什么用 was 而不用 were To our joy,________________-To our joy,________________1.two-fifth of the work has been finished2.two-fifths of the work have been finished3.two-fifth of the work have been finished4.two-fifths of the work has been finished Two fifths of the land in that district ( ) covered with trees and trees and grass. Two fifths of the land iin that country ____covered with trees and grassA are B is ( )of the students in our class( _ )interested in micro blogs(微博)on the Internet A Two fifths; is B Two fifths areC.Two five is D Two-five are 4.The stone is about ___ the size of a basketball.A.two fifth B.two fifths C.two five D.two fives ._____ of the land in that district _____ Covered with trees and grass.A.Two fifth; is B.Two fifth; are C.Two fifths; is D.Two fifths; are为什么是C? _____ of the land in that district_____ covered with trees and grass.A.Two fifth;isB.Two fifth;areC.Two fifths;isD.Two fifths;are请选出答案并说明为什么这样选,有什么语法根据! 3.___ of the land in that district ___ covered with trees and grass.A Two fifth, is B Two fifths,is我只想知道 Two fifth, Two fifths 两个的区别,含义~ 1. ____ of the land in this district _______ covered with trees and grass.A. Two fifths; are B. Two fifth; arec. Two fifth; is D.Two fifths; is 写原因,最好详细一点 two fifths of the population 后加is还是are?many kinds of polution 后加is还是are? Three-fifths of the money has gone two fifths与two-fifths的区别