填空题 Nearly three quarters of the surface of the earth are covered with water, and there would be even less land if the polar icecaps were melt.
A. three quarters of the surface
B. are
C. there
D. if
【正确答案】
【答案解析】B 应改为is。[解析] 因为主语是“surface”，是不可数名词，所以谓语动词用单数。本句的意思是：“地球几乎四分之三的表面是水，如果两极的冰山融化了的话，陆地就更少了。”