Seventy-five percent of the surface of the earth ______ by water.A、are coveredB

游客2024-07-23  19

问题 Seventy-five percent of the surface of the earth ______ by water.

选项 A、are covered
B、have been covered
C、is covered
D、was covered

答案 C

解析 句子意为:地球表面的75%都被水所覆盖。本题测试主谓一致。因surface是不可数名词,故谓语用单数形式。
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