It will take a long time for the effective use of natural resources ．( )A．to be madeB．to makeC．being madeD．making 题目和参考答案——青夏教育精英家教网——

题目内容

15．It will take a long time for the effective use of natural resources _________．（　　）

A．

to be made

B．

to make

C．

being made

D．

making

分析实现天然气的有效使用花了很长时间．

解答答案：A．原句可改为：To make the effective use of natural gas took a long time．这里使用的是It will take+一段时间+to do sth，不定式是这句话的主语，it是形式主语，而且the effective use of natural resources和make是被动关系，选A．

点评考查不定式的用法．
不定式被动式的用法
不定式到底用主动形式还是被动形式，往往取决于句子的意思，即意思上为主动就用主动形式，意思上为被动就用被动形式：
Did it need to be done so soon？这事需要这么快就做吗？
She can't bear to be laughed at．她受不了被人嘲笑．
There was business to be taken care of．有生意要人管理．

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5．Some people may be born happy，while others are genetically negative，scientists have suggested in a study published late February in a British journal．
Earlier research had already established that the gene known as 5-HTTLPR plays a key role in determining how the neurotransmitter （神经传递素） serotonin works within the brain．Serotonin，a hormone （荷尔蒙），passes chemical messages between nerve cells．It has been closely linked to mood．Several anti-depressant （抗抑郁） drugs regulate serotonin levels．
Scientists had also identified three variants （变体） of the gene．Two so-called"short"variants were linked to a higher risk of depression and suicide （自杀） attempts．Unlike the two"short"variants，the"long"variant of 5-HTTLPR showed a clear dislike of negative images，such as fierce animals，and a clear liking for positive ones，such as flowers．
Researchers from the University of Essex in Britain showed participants a series of images，which were divided into three kinds：negative ones aimed at inspiring fear or stress such as a snake or person about to commit suicide，pleasant ones and neutral （中性的） ones．
The participants who had the long variant of the 5-HTTLPR gene"showed a clear dislike of negative material alongside a careful attention for positive material，"the researchers found．They paid close attention to the pretty pictures，and ignored the frightening ones．On the other hand，the short variant groups had the opposite reaction．
In January，the Australian government organized"happiness workshops"，teaching government staff how to be happy．The department that held the"happiness workshops"said unhappy staff weren't productive staff．
Australian political opposition parties have argued that the"happiness workshops"are probably a waste of money and couldn't increase productivity as intended．However，whether the workshop will have a happy or disappointing result，we will have to wait and see．

71．Various kinds of images were shown to the participants toC．
A．draw their attention
B．cater to their different tastes
C．find out about their reactions
D．teach them to improve their artistic appreciation
72．The"short"variants of 5-HTTLPR differ from the"long"variants of 5-HTTLPR in thatB．
A．the former is connected with positive mood while the latter negative
B．the former is connected with negative mood while the latter positive
C．the former has a greater effect on one's mood than the latter
D．the latter has a greater effect on one's mood than the former
73．Which of the following statements is true about"happiness workshops"？D
A．Most people believe that they are a waste of money．
B．They will be beneficial in the long run．
C．The purpose of"happiness workshops"is to teach all Australians to be happy．
D．They are organized in the belief that happy staff can work more efficiently．
74．It can be learned from the article thatA．
A．drugs can be used to control people's serotonin levels
B．happiness is more important than sadness
C．nothing can affect our mood
D．people with the short variant of 5-HTTLPR prefer a flower to a snake
75．The article is mainly aboutB．
A．the reason for the foundation of"happiness workshops"
B．the link between people's mood and their gene
C．the study on people's likes and dislikes
D．the differences in people's attitude towards life．

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Wild strawberries offer a good example of hitchhiking tactics．When strawberry seeds are still young and not yet ready to be planted，the surrounding fruit is green，sour and hard．When the seeds finally mature，the berries turn red，sweet，and tender．The change in the berries'colour serves as a signal to birds which then eat the strawberries，fly off，and eventually spit out the seeds．
Naturally，strawberry plants didn't set out with a conscious intention of attracting birds only when their seeds were ready to be dispersed．Nor did birds set out with the intent of planting strawberries．Rather，strawberry plants evolved through natural selection．The sweeter and redder the final strawberry，the more birds spread its ripe seeds； the greener and more sour the young strawberry，the fewer birds destroyed the seeds by eating berries before the seeds were ready．
46．What does the underlined word"dispersed"in the third paragraph mean？A
A．spread
B．eaten
C．born
D．planted
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A．Hitchhiking．
B．Blowing in the wind．
C．Floating on water．
D．Tracking an animal．
48．Which strategy does the example of wild strawberries describe？D
A．The conscious intent of attracting birds．
B．Spreading by walking．
C．Spreading by flying．
D．The strategy of taking a lift．
49．Why does the author describe how strawberry seeds are spread？C
A．To show plants are good at adapting to the environment．．
B．To show strawberry's special way．
C．To show the plant has different ways of spreading seeds．
D．To show the mystery of plant．
50．What's the passage mainly about？B
A．How animals disperse offspring．
B．How plants disperse their offspring．
C．Plant evolution．
D．Plants'hitchhiking on animals．

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•（37）B
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•Laugh as you like
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A．Adapt your exercise routine to the biological clock．
B．Eat little and often．
C．These things are activated by laughing．
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