14．很多珍稀動物已經(jīng)滅絕的原因是它們無法適應(yīng)新的環(huán)境，因此我們必須更加注重保持生態(tài)平衡． （so）The reason why many rare animals became extinct was that they were not able to adapt （themselves） to the new environment，so we must pay more attention to keeping the balance of nature．．

分析 The reason why many rare animals became extinct was that they were not able to adapt （themselves） to the new environment，so we must pay more attention to keeping the balance of nature．

解答 The reason why many rare animals became extinct was that they were not able to adapt （themselves） to the new environment，so we must pay more attention to keeping the balance of nature．
本句的主句部分是分析的動物已經(jīng)滅絕的原因，所以為一般過去時；而從句部分則為現(xiàn)在的對策，應(yīng)用一般現(xiàn)在時．
本句為一復(fù)雜的主從復(fù)合句，其中主句的主語后面應(yīng)用一個why引導(dǎo)的定語從句來修飾，后面的原因部分用that引導(dǎo)的表語從句；從句為so引導(dǎo)的結(jié)果狀語從句．become extinct滅絕；adapt（oneself）to使（自己）適應(yīng)；pay attention to注意；the balance of nature自然平衡、生態(tài)平衡．

點評 本句句式較復(fù)雜，學生有的容易用混句型，要逐步分清不同的句式以及在句子中的相應(yīng)成分，分清主從句．如：Whether he will come to the meeting is up to his boss．

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科目：高中英語 來源： 題型：閱讀理解

18．If you didn't look  at them，they weren't there，right？On seeing those in rags on the corner，I only wanted the light to turn green fast enough so that I wouldn't have to keep pretending not to see them．
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5．When my brother and I were young，my mom would take us on Transportation Days．
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科目：高中英語 來源： 題型：閱讀理解

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"Correct，"she said．
It turned out that the correct answer was zero．
What did I learn that day？First，always do all your homework．Second，in real life it isn't always what you say but how you say it that matters．Third，I would never make it as a mathematician．
If I could choose one school day that taught me the most，it would be that one．

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B．It is important to make an effort
C．It is right to stick to one's belief．
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C．a(chǎn)nswer their homework questions orally
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A．a(chǎn)sked questions in a regular way
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B．A Future Mathematician
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