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5.The professor paused as if________his students to ask questions on the point he had just made.

A.expecting        B.having expected

C.expected        D.to have expected

解析:选A。当as if从句的主语和主句的主语一致,且从句又包含充当谓语的be时,从句的主语和be就常常省略。

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4.On one side of the road trees will be planted,and________.

A.on the other are flowers and grass

B.on another flowers and grass

C.on the other flowers and grass

D.on another are flowers and grass

解析:选C。并列句中,如果后面分句和前面分句有相同的词,通常可以省略,以免重复。

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3.Be careful with such things.If you________,you’ll drop them.

A.don’t          B.aren’t

C.will           D.do

解析:选B。if引导的条件状语从句中常用一般现在时表将来。If you aren’t后省略了careful with such things。

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2.(2010年安徽芜湖一中一模)-What were you trying to prove to the police?

-________I was last night.

A.That           B.When

C.Where          D.What

解析:选C。此处是一个省略回答。完整的句子是I was trying to prove to the police where I was last night。即我极力想要向警方证明我昨天晚上在什么地方。其他选项语意不通顺。

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本单元语法--省略

1.-How are you getting on with your work?

-Oh,I’m sorry.Things aren’t going so well as________.

A.plans           B.planning

C.planned          D.to plan

解析:选C。as planned=as they were planned。

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5.It is known to all that______you exercise regularly,you won’t keep good health.

A.unless        B.whenever

C.although       D.if

解析:选A。unless “除非”;whenever “无论何时”;although “尽管”;if “如果”。句意:众所周知的是,除非你进行有规律的锻炼,否则你不会保持身体健康。

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4.________ you’ve tried it,you can’t imagine how pleasant it is.

A.Unless         B.Because

C.Although       D.When

解析:选A。此题考查状语从句的连接词。unless “除非,如果不”;because “因为”;although “虽然”;when “当……时候”。

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3.We won’t keep winning games________we keep playing well.

A.because        B.unless

C.when         D.while

解析:选B。此题考查条件状语从句。句意:我们不会一直赢得比赛的胜利,除非我们一直打得好。根据句意分析,状语从句与主句是条件与结果的关系。

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2.(2008年高考天津卷)We’ll have a picnic in the park this Sunday________it rains or it’s very cold.

A.since         B.if

C.unless         D.until

解析:选C。句意:除非下雨或天很冷,我们将在本周日去公园野餐。从句子之间的逻辑关系判断此处应为条件句,且为否定条件,相当于if...not,故排除if,而选unless。A项since表因果关系。D项until只能引导时间状语从句,故排除。

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1.(2008年高考全国卷Ⅱ)A small car is big enough for a family of three________you need more space for baggage.

A.once          B.because

C.if            D.unless

解析:选D。句意:如果你不需要更多存放行李的空间,一辆小汽车对三口之家便足够了。once一旦……;because因为……;if如果……;unless如果不……。

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