1.The population of this city, forty percent of which ______15% in the last three years.  A. are Germans; has risen by  B. are Germen; has fallen by  C. is Germans; have increased to  D. are Germans; have been reduced by 分析:本题旨在考查本单元的词汇population的用法以及主谓一致。population强调人口是多少时,若作主语,谓语动词用单数形式。population强调人口的身份或特征,若后面作表语的名词是复数时,谓语动词则要用复数形式。据题意,第一空中Germans 用复数,则谓语动词用复数,B、C两项可排除,而the population of this city强调人口,谓语动词需用单数,故本题最佳答案为A。 2.You will be late ______ you leave immediately.  A. unless  B. until  C. if  D. or 解析:本题考查连词的用法。unless"除非......",与本题中"除非立刻就去,不然你会迟到的"意义相符。而until"直到......才......"常表示延续动作或状态直到某时结束。or表示"或者""否则",如选D,原题应为leave immediately, or you will be late,这属于另一种句型。故选A。 3.______ him and then try to copy what he does.  A. Mind B. Glance at C. Stare at D. Watch 解析:本题考查动词的辨析。本句句意是"先仔细观察,然后照他那样去做"。mind"介意,在乎",glance at"粗略的看(一下)",stare at "盯着、凝视",watch"观察、观赏",因而不难选出答案。答案选D。 4.I can hardly hear the radio, would you please _____?  A. turn it on  B. turn it down  C. turn it up  D. turn it off 解析:本题考查动词词组的辨义。题中的信息是"收音机声音太低,听不清楚",故可知应"调大音量",A项为"打开",B项为"把......调低",C项为"把......调高",D项为"关闭"。故选C。 5.The boy wanted to ride his bicycle in the street, but his mother told him______.  A. not to  B. not to do  C. not do it  D. do not to 解析:本题考查不定式作宾补的用法,事实上是直接引语转为间接引语的用法。本题理解为The boy's mother said "Don't ride in the street",转为间接引语后为:The boy's mother told him not to ride in the street. 然后再根据英语中避免重复的原则;将前面出现的ride in the street省略,选出答案A。

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