来自姜志国的问题
Asweallknow，__________oftheearthsurfaceiscoveredbywater．（）A.ThreefoursB.ThreefourthsC.ThirdfoursD.Thirdquarters
As we all know，__________ of the earth surface is covered by water．（）
A.Three fours
B.Three fourths
C.Third fours
D.Third quarters
