Question

【题目】— Why does the earth look blue in space?
— Because most of the earth's surface by water.
A.covers
B.is covered
C.cover
D.are covered

Answer 1

【答案】B
【解析】考查动词的语态。句意：-为什么在太空中，地球看上去是蓝色的？-因为地球的大部分地方被水覆盖着。句子的主语是surface是谓语动词cover的承受者，句子用被动语态，most ofthe earth’s surface表示单数含义，谓语动词用单数。故选B。