問題詳情:
Threefourths of the surface of the earth________covered by water.
A.is B.are C.were D.has been
【回答】
A
知識點:一般現在時及其被動式
題型:選擇題
問題詳情:
Threefourths of the surface of the earth________covered by water.
A.is B.are C.were D.has been
【回答】
A
知識點:一般現在時及其被動式
題型:選擇題