The threats to the health of astronauts in space are very different from on earth．( )A．onesB．thatC．itD．those 题目和参考答案——青夏教育精英家教网—

题目内容

20．The threats to the health of astronauts in space are very different from ______ on earth．（　　）

A．

ones

B．

that

C．

D．

those

分析在太空中对宇航员健康的威胁不同于地球上的威胁．

解答答案为D．
one指代可数名词单数，表泛指；that指代可数名词单数或者不可数名词，后面有定语修饰，表特指．It指代上文出现的同一事物．Those指代可数名词复数，后面有定语修饰，表示特指．本题的those=the threats，后面有on earth修饰．结合句意可知D正确．

点评考察代词用法．本题还可通过判断代词单复数来先排除两个选项，加快做题速度．

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	A．	which it is that		B．	what is it that
	C．	how it is that		D．	why it is that

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A journal （63）called （call）Annals of Family Medicine recently published an article，（64）which called for doctors to start treating children's contact to secondhand smoke as abuse．In that case，contact to secondhand smoke would be viewed much like physical abuse or neglect．The author of the article，Dr．Adam Goldstein，is （65）a professor at University of North Carolina School of Medicine．He says secondhand smoke （66）causes（cause）many diseases in children．
The U．S．Centers for Disease Control and Prevention agree that secondhand smoke can cause serious health problems in children．They say that compared to children who grow up in homes （67）without smokers，children with parents who smoke have smaller lungs and（68）more（many）illnesses．
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-__ ___．Class One also has strong players．（　　）

	A．	That's good		B．	It's kind of you
	C．	It's hard to say		D．	I think so

12．---We've missed the train!
---_________!There'll be another in ten minutes．（　　）

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-____．It's only open from 9a．m．to midnight．（　　）

	A．	Well，I'm not sure		B．	Oh，it's nothing special
	C．	Sorry，I'm afraid not		D．	Yes，of course not

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	A．	so did the airlines		B．	nor did the airlines
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