1. Onethird of the country ______ covered with trees and the majority of the citizens ______ black people. (2011•湖南卷26)
A. is; are B. is; is C. are; are D. are; is
【解析】选A。分数及百分比后接名词的谓语动词由名词的单复数来决定。名词为单数谓语动词就用单数；名词为复数，谓语动词则用复数。a/the majority of(大多数)后接复数谓语动词用复数。
2. The factory used 65 percent of the raw mat erials, the rest of which ______ saved for other purposes. (2011•安徽卷27)
A. is B. are C. was D. were
【解析】选D。the rest of ＋n.后的谓语动词单复数由名词单复数而定。此句中which指代raw materials(原材料)。根据前后句的时态一致性可知要用一般过去时。进行含义。
考点1.代词作主语
Nothing but stamps and envelopes ______ for sale.
A. are B. is C. are left D. remain
【解析】选B。nothin g作主语表单数概念，谓语动词用单数。but后的名词不影响谓语动词的单复数。
主谓一致的原则：形式一致；内容一致；就近一致。
1. 由each, either, neither, one, the other, another, anyone, anybody, anything, everyone, everybody, everything, someone, somebody, something , nobody, no one, nothing等指代单数名词的不定代词作主语时，谓语动词用单数。
2．主语是who, what, which, all, more, most, some, any, none, the rest等时，谓语动词的形式须依据具体情况而定。
3. such, the same 起指示代词作用时，应根据其所指定的内容来决定单复数。
