问题
选择题
________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
答案
答案：A
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________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
答案：A