Help others whenever you can. you will make the world a nicer place to live in．( )A．orB．ifC．andD．but 题目和参考答案——青夏教育精英家教网—

题目内容

2．Help others whenever you can，______ you will make the world a nicer place to live in．（　　）

A．

B．

C．

and

D．

but

分析尽可能帮助别人，这样你就会让世界变成一个更加美好的地方．

解答答案：C；
根据语境以及上下文，本题考查的是连词的用法．根据题干推测句意是"尽可能帮助别人，这样你就会让世界变成一个更加美好的地方．"，可知前后句之间是顺接关系，所以用连词and；构成句式：祈使句+and+主句，故选C．

点评本题主要考查连词的用法，做此类题目一定要弄清句意，明白上下文之间的关系，比较和分析选项中连词的不同含义及其用法才能更好地判断出所要用的连词．

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13．I can't remember exactly what she said，but I'm sure about what she meant．

10．Dad bought a diamond necklace for mum as a present on herfortieth （四十） birthday．

17．-Excuse me，could you tell me_________？
-Sure，sir．You can try www．taobao．com．（　　）

	A．	where can I join in the group-buying
	B．	where did I join in the group-buying
	C．	where I can join in the group-buying
	D．	where I joined in the group-buying

7．---Can you share with us the reason why your team could win the final？
---Nothing special．You just need to ______new challenges and never give up．（　　）

14．There was a long queue of people waiting to beserved （服务）．

11．-Have you seen the TV play My Ugly Mother？
-Yes，It's well worth ________．It's moving that I've seen it twice．（　　）

8．We are now living in the modern society．Most of the energy we use for heating，lighting，transportation and manufacturing （制造业） comes from fossil （化石） fuels．These are carbon-based fuels from oil，coal and natural gas．When we burn these fuels we release heat which （63）provides the energy．
There are three main disadvantages to using these fuels．Firstly，they are causing climate problems because of the （64）Greenhouse Effect．When we burn fossil fuels they produce carbon dioxide which causes global warming．Secondly，when we have used up all our coal，oil and natural gas，we will have （65）nothing left to burn．Thirdly，they are not very efficient．The internal combustion engine （内燃机） that we use in most cars，trucks and buses，for example，is only about 14% efficient．
Scientists are working on another fuel-hydrogen．There are a couple of advantages to using hydrogen as a fuel．Firstly，because two-thirds of the （66）earth's surface is water and water is made of hydrogen and oxygen．There is an almost unlimited supply of hydrogen．Secondly，burning hydrogen does not cause global warming．Thirdly，it is much more efficient than carbon-based fuels．
Unfortunately there are problems with hydrogen at the present time：there is the problem of separating （分离） it from water （67）cheaply，and there is the difficulty of storing it．It can be stored under pressure but high pressure tanks are far from safe．It can also be stored as a liquid but only at extremely low temperatures．It seems likely，therefore，that there will have to be a completely new technology before hydrogen replaces fossil fuels．（68）Solving these problems is an urgent （急迫的） matter．Although China，India and Australia have huge amounts of cheap coal，and there are still （69）large oil and gas reserves（储藏量） elsewhere，the effects on the planet's climate will be bad if they are used．

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