问题: 选择题，快~~~~~~~~~~~~~~~~~~~~
1.three-fourths of the earth's surface ____covered by water.
A.is B.are C.has been
2.I think it's a bad idea.
___________________
A.I couldn't agree more
B.I couldn agree more
c.I couldn't agree with more
3.The two sides have______the date of negotiations(谈判）
A. areed with B.agreed on C.agreed to
解答:
逐题分析吧.
1.three-fourths of the earth's surface ____covered by water.
A.is B.are C.has been
这里考察分数以及不可数名词的用法.当"分数/百分数+of+名词的结构在句中做主语时，谓语的人称与名词的单复数保持一致．
地球表面为抽象名词,谓语应用单数，因为＂地球表面是被覆盖＂，所以要用被动语态，选Ａ．
2.I think it's a bad idea.
___________________
A.I couldn't agree more
B.I couldn agree more
c.I couldn't agree with more
首先已经不是答案的问题了，你把ＡＢ的答案都重复了吧．你看Ｂ的＂也是couldn't对吧．你打漏的Ａ应该是＂I couldn't agree any more",双重否定即肯定，所以Ａ的意思是＂再同意不过了＂，Ｃ的搭配是错误的．
选Ａ
3.The two sides have______the date of negotiations(谈判）
A. areed with B.agreed on C.agreed to
通常表示日期的商定要用介词＂on".
选Ｂ
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