________of the surface of the earth_____
题型:选择题
问题:
________of the surface of the earth________covered with water.[ ]
A.Two thirds;is
B.Two third;is
C.Two thirds;are
D.Two third;are
________of the surface of the earth________covered with water.[ ]
A.Two thirds;is
B.Two third;is
C.Two thirds;are
D.Two third;are