题目内容
【题目】70 percent of the earth _______ covered with water.
A. are B. is C. were D. being
【答案】B
【解析】句意：地球的百分之七十被水覆盖。70 percent of the earth看作是一个数字，所以动词用单数；故选B
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【题目】70 percent of the earth _______ covered with water.
A. are B. is C. were D. being
【答案】B
【解析】句意：地球的百分之七十被水覆盖。70 percent of the earth看作是一个数字，所以动词用单数；故选B