14．假定英語課上老師要求同桌之間交換修改作文，請你修改你同桌寫的以下作文．文中共有10處語言錯誤，每句中最多有兩處．每處錯誤僅涉及一個單詞的增加、刪除或修改．
增加：在缺詞處加一個漏字符號（∧），并在其下面寫上該加的詞．
刪除：把多余的詞用斜線（\）劃掉．
修改：在錯的詞下面劃一橫線，并在該詞下面寫上修改后的詞．
注意：1．每處錯誤及其修改均僅限一詞；
=2．只允許修改10處，多者（從第11處起）不計分．
Nowadays，there is a heated discussion in our school about if cloning should be allowed or not．Some students are strong for it．There are four reasons account for this．First，cloning is optional way to treat the parents who find it difficult to have children．Another reason is to reproduce such great talents like Einstein．A further reason is to obtain a supply of stem cell which can develop into every other type of cell in the body．So it was possible for someone badly injured to recover．A fourth reason is that scientists believe that a cloning crop can resist pests．Besides，the students against cloning hold the view that it will raise up many problems．

分析 近來，是否允許克隆成為我校的一個熱點話題．一些學(xué)生強烈支持，他們認為克隆可以幫助不能生育孩子的父母，也能創(chuàng)造出像愛因斯坦一樣的天才，還可以提供干細胞．干細胞可以成為其他任何一種身體細胞，有利于治愈受傷嚴重的人．此外，一些科學(xué)家相信，克隆還可以抵御病蟲．但是反對的同學(xué)也提出了許多問題．

解答 Nowadays，there is a heated discussion in our school about if cloning should be allowed or not．Some students are strong for it．There are four reasons account for this．First，cloning is∧optional way to treat the parents who find it difficult to have children．Another reason is to reproduce such great talents like Einstein．A further reason is to obtain a supply of stem cell which can develop into every other type of cell in the body．So it was possible for someone badly injured to recover．A fourth reason is that scientists believe that a cloning crop can resist pests．Besides，the students against cloning hold the view that it will raise up many problems．
詳解：
1．if改為whether  考查賓語從句引導(dǎo)詞．因為if表示"是否"時不能引導(dǎo)介詞賓語從句，而whether可以．       
2．strong改為strongly  考查副詞．應(yīng)用副詞修飾介詞短語for it，"強烈支持"．
3．a(chǎn)ccount改為accounting 此處考查的是非謂語動詞作定語的用法，因為reasons和account之間存在邏輯上的主謂關(guān)系，表示主動，所以此處應(yīng)用account的現(xiàn)在分詞形式作定語．
4．optional前面增加an  考查冠詞． 因為way是可數(shù)名詞，在此處是泛指，而optional又是以元音音素開頭，所以應(yīng)在optional前加an．   
5．like改為as  考查介詞．such…as…是固定短語，意為"像…一樣的…"．        
6．cell改為cells  考查名詞單復(fù)數(shù)．cell是可數(shù)名詞，根據(jù)前面的obtain a supply of可判斷出，此處應(yīng)用其復(fù)數(shù)形式，表示"干細胞"．
7．was改為is   考查時態(tài)．根據(jù)上下文語境"there is""are"等可判斷出，此處應(yīng)用一般現(xiàn)在時．       
8．cloning改為cloned  考查過去分詞．此處應(yīng)用clone的過去分詞形式cloned"克隆過的"充當(dāng)形容詞作crop的定語．
9．Besides改為However/Nevertheless  考查連詞．語境表示，支持克隆的學(xué)生認為克隆有很多好處，但是反對克隆的學(xué)生認為克隆會導(dǎo)致很多問題．此處應(yīng)用表示轉(zhuǎn)折關(guān)系的副詞However/Nevertheless．
10．刪除up 考查介詞．因為raise是及物動詞，后面接賓語時不用加介詞．

點評 短文改錯要注意：1．在做題時，首先要通讀全文，了解文章大意．2．整句理解，逐行分析．3．單獨檢查全篇的動詞、連詞、名詞、冠詞、代詞等，這些都是容易出錯的地方，也是�？疾榈闹R點．4．切忌改動原文的意思，一定要在看懂原文的基礎(chǔ)上改錯，以保持原意為原則．5．橫線上改正后的單詞一定要注意拼寫正確，書寫的清晰工整，便于閱卷．6．要嚴格的按照規(guī)定的符號去改，用文字說明或箭頭表示都是錯誤的．7．讀懂全文，驗證答案，消除疏忽．

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刪除：把多余的詞用斜線（\）劃掉．
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Randy Nelson heads the Department of Neuroscience at Ohio State University．He says animals that slept in blue and white light appeared to be the most depressed．"What we saw is that these animals didn't show any sleep uneasiness at all but they did mess up biological clock genes and they did show depressive sign while if they were in the dim（微弱）red light，they did not．"
Randy Nelson notes that photosensitive（感光）cells in the eyes have little to do with eyesight．He says these cells send signals to the area of the brain that controls what has been called the natural sleep-wake cycle．
He says there's a lot of blue in white light．This explains why the blue light and white light hamsters appear to be more depressed than the hamsters seeing red light or darkness．

25．Researchers use hamsters in the experiment becauseD．
A．they are similar to humans in dealing with colors
B．they are easy to observe and study
C．they are sensitive to colors like human beings
D．they are active at night and sleep during the day
26．What sign shows that the hamsters are being depressed？A
A．They drink less sugary water．
B．They don't sleep well．
C．Their eyesight becomes worse．
D．Their energy level becomes low．
27．Ctends to cause hamsters to be depressed．
A．Dim light 
B．Red light
C．Blue light 
D．Darkness
28．What can help people who work late at night to avoid being depressed？B
A．Not being exposed to dim red light when using computers．
B．Equipping their computer screens to put it more in the reddish light．
C．Living or working in low levels of light overnight．
D．Going to see doctors of clinical depression regularly for help．

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