(About two thirds) of the earth is covered with water.对括号里的部分提问

About _______of the works in the factory were born in the___________.A.two-thirds;1970B.two-thirds;1970sC.two-third;1970D.two-third;1970s The number of the students in our grade is about six hundred,two thirds of them are girls.为什么要用“ two thirds 2.About two thirds of Earth is covered by water.用英语 句子解释是什么 About two thirds of the village()by waterA.is coveringB.is coveredC.are coveredD.are covering (About two thirds) of the earth is covered with water.对括号里的部分提问 About _of the workers in the factory were born in the_ A.two-thirds,1970 B.two-thirds,1970s C....About _of the workers in the factory were born in the_ A.two-thirds,1970 B.two-thirds,1970s C.two-third,1970 D.two-third,1970 About( ) of the students in our school took part in the school sports meeting last fridayA.one-thirds B.two-thirds C.one-fifths D.two-thirds标准答案是d,我也不知道是为什么, two thirds是啥意思? About __of the workers in the factory were born in the__ A.two-thirds 1970 B.two-thirds 1970s还有C.two-third 1970 D.two-third 1970s 望详细回答, 4. About _____ of the workers in the factory were born in the _______A,two thirds;1970B,two thirds;1970s C,two third;1970D,two third;1970s About _____of the workers in the factory wre born in the ______.A.two-thirds;1970 B.two-thirds;1970sC.two-third;1970 D.two-third;1970有横线为什嘛还加s啊? About ＿＿of the students in our class were born in the ＿＿A:two third ﹔1990s B:two third﹔1990 C:two thirds﹔1990s D:two thirds﹔1990 ( )the studentsin these primary school is about three thousand,( )of them are girls.A.a number of,two third B.the number of ,two thirds C.a number of ,two thirds D.the number of,two third 三分之二是two-third还是two-thirds? About ____of the workers in the factory were born in the __ A two—thirds,1970 B two-thirds,1970s Ctwo-third,1970 D two-third,1970s.答案为什么是D how about two o‘clock tomorrow afternoon? two third和two-thirds区别甚么时候用two third甚么时候用two-thirds 序数词和基数词中的,two-thirds,