题目内容

【题目】His injuries were severe. Five minutes late, _______he would have died.

A. but B. or C. so D. and

【答案】D

【解析】

试题分析:考查固定句式。本题中含有特殊句式:祈使句+连词+陈述句=If引导的条件句+主句。如Hurry up , or you will be late. 这个句型进一步转换成:名词短语+连词+陈述句。如果原句中的连词是and,那么可以转换成一个肯定的条件句;如果原句中的连词是or,可以转换成一个否定的祈使句。句意:他的伤很严重,如果再晚五分钟,他就会死掉。本句可以转换成:If it had been five minutes late, he would have died.故D正确。

【举一反三】

〖06重庆〗 and I’ll get the work finished.

A. Have one more hour B. One more hour C. Given one more hour D. If I have one more hour

〖答案〗B

〖解析〗本题考查 “祈使句+and+简单句”的用法, 其中祈使句可转换成名词短语, 如One more word and I’ll beat you flat.因此B项正确。如果选C, D两项, 要去掉and。

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【题目】Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably sing or whistle when you are happy.

Some scientists believe that birds do sing some of the time just because they are happy. However, they sing most of the time for a very different reason. Their singing is actually a warning to other birds to stay out of their territory.

Do you know what a “territory” is? A territory is an area that an animal, usually the male, claims(声称)as its own. Only he and his family are welcome there. No other families of the same species (物种) are welcome. Your yard and house are your territory where only your family and friends are welcome. If a stranger should enter your territory and threaten you, you might shout. Probably this would be enough to frighten him away.

If so, you have actually scared the stranger away without having to fight him. A bird does the same thing. But he expects an outsider almost any time, especially at nesting(筑巢)season. So he is screaming all the time, whether he can see an outsider or not. This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away.

Birds sing loudest in the spring when they are trying to attract a mate and warn others not to enter the territory of theirs.

You can see that birds have a language all their own. Most of it has to do with attracting mates and setting up territories.

1Some scientists believe that most of the time birds’ singing is actually __________.

A. an expression of happiness B. a way of greeting

C. an expression of anger D. a way of warning

2What is a bird’s “territory”?

A. A place where families of other species are not accepted.

B. A place where a bird may shout at the top of its voice.

C. An area which a bird considers to be its own.

D. An area for which birds fight against each other.

3Why do birds keep on singing at nesting season?

A. Because they want to invite more friends.

B. Because their singing helps frighten outsiders away.

C. Because they want to find outsiders around.

D. Because their singing helps get rid of their fears.

4How does the writer explain birds’ singing?

A. By comparing birds with human beings.

B. By reporting experiment results.

C. By describing birds’ daily life.

D. By telling a bird’s story.

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