数词
1．The factory used 65 percent of the raw materials，the rest of which ______ saved for other purposes.
A．is B．are
C．was D．were
答案 D [句意：这家工厂用了65%的原材料，剩余的被作为它用。raw materials是先行词，which引导的定语从句中，the rest作主语；the rest作主语时，谓语的数由其后的名词而定，而which＝raw materials，所以谓语要用复数形式；由主句中的时态可知，从句中要用一般过去时态。故选D项。]
2．Onethird of the country ______covered with trees and the majority of the citizens ______ black people.
A．is；are B．is；is
C．are；are D．are；is
答案 A [“国家三分之一的领土”在概念上是单数，故系动词用单数；而 “国家公民的大多数”是复数，故系动词用复数。句意：这个国家三分之一的领土被树木覆盖且多数公民为黑人。故选A项。]
3．The girl found the Tshirt sold online was______that in the supermarket.
A．as half cheap as B．cheap as half as
C．the half price of D．half the price of
答案 D [句意：这个女孩发现网上卖的T恤衫是超市里卖的价格的一半。倍数的表达有三种方式：
