Question

【题目】About seventy percent of our earth _______ by water.

A. is covering B. is covered

C. are covered D. are covering

Answer 1

【答案】B

【解析】试题分析：句意：地球上大约百分之七十被水覆盖。此题考查主谓一致，地球为一个整体，百分数的谓语跟它所修饰的名词，所以为单数；be covered with被覆盖。根据句意，应选B。