breaks the law will be punished by law.

1. A.
   Whoever
2. B.
   Who
3. C.
   No matter who
4. D.
   A or C

As the pace of life continues to increase, we are fast losing the art of relaxation. Once you are in the habit of rushing through lift, being on the go from morning till night, it is hard to slow down. But relaxation is essential for a healthy mind and body.                              

Stress is a natural part of everyday life and there is no way to avoid it. In fact, it is not the bad thing it is often supposed to be. A certain amount of stress is vital to provide motivation and give purpose to life. It is only when the stress gets out of control that it can lead to poor performance and ill health.                                                

The amount of stress a person can withstand depends very much on the individual. Some people are not afraid of stress, and such characters are obviously prime material for managerial responsibilities. Others lose heart at the first signs of unusual difficulties. When exposed to stress, in whatever form, we react both chemically and physically. In fact we make choice between "fight" or "flight" and in more primitive days the choice made the difference between life or death. The crises we meet today are unlikely to be so extreme, but however little the stress is, it involves the same response. It is when such a reaction lasts long, through continued exposure to stress, that health becomes endangered. Such serious conditions as high blood pressure and heart disease have established links with stress. Since we cannot remove stress from our lives (it would be unwise to do so even if we could), we need to find ways to deal with it.                                                               

People are finding less and less time for relaxing themselves because_____.                                                  

A. they do not know how to enjoy themselves                                       

B. they do not believe that relaxation is important for health      C. they are travelling fast all the time                                                    

D. they are becoming busier with their work  

According to the writer, the most important character for a good manager is his ________.   

A. not fearing stress                                                  B. knowing the art of relaxation         

C. high sense of responsibility                                   D. having control over performance   

Which of the following statements is true?  

A. We can find some ways to avoid stress.  

B. Stress is always harmful to people. 

C. It is easy to change the habit of keeping oneself busy with work.  

D. Different people can withstand different amounts of stress.  

In Paragraph 3, "such a reaction" refers back to_______. 

A. "making a choice between 'flight' or 'fight'"                                                         

B. "reaction to stress both chemically and physically"                                                     

C. "responding to crises quickly"

D. "losing heart at the signs difficulties" 

In the last sentence of the passage, "do so " refers to ______.     

A. "expose ourselves to stress"                               

B. "find ways to deal with stress" 

C. "remove stress from our lives"                   

D. "established links between diseases and stress"

As the pace of life continues to increase, we are fast losing the art of relaxation. Once you are in the habit of rushing through lift, being on the go from morning till night, it is hard to slow down. But relaxation is essential for a healthy mind and body.                              

Stress is a natural part of everyday life and there is no way to avoid it. In fact, it is not the bad thing it is often supposed to be. A certain amount of stress is vital to provide motivation and give purpose to life. It is only when the stress gets out of control that it can lead to poor performance and ill health.                                                

The amount of stress a person can withstand depends very much on the individual. Some people are not afraid of stress, and such characters are obviously prime material for managerial responsibilities. Others lose heart at the first signs of unusual difficulties. When exposed to stress, in whatever form, we react both chemically and physically. In fact we make choice between "fight" or "flight" and in more primitive days the choice made the difference between life or death. The crises we meet today are unlikely to be so extreme, but however little the stress is, it involves the same response. It is when such a reaction lasts long, through continued exposure to stress, that health becomes endangered. Such serious conditions as high blood pressure and heart disease have established links with stress. Since we cannot remove stress from our lives (it would be unwise to do so even if we could), we need to find ways to deal with it.                                                               

People are finding less and less time for relaxing themselves because_____.                                                  

A. they do not know how to enjoy themselves                                       

B. they do not believe that relaxation is important for health      C. they are travelling fast all the time                                                    

D. they are becoming busier with their work  

According to the writer, the most important character for a good manager is his ________.   

A. not fearing stress                                                  B. knowing the art of relaxation         

C. high sense of responsibility                                   D. having control over performance   

Which of the following statements is true?  

A. We can find some ways to avoid stress.  

B. Stress is always harmful to people. 

C. It is easy to change the habit of keeping oneself busy with work.  

D. Different people can withstand different amounts of stress.  

In Paragraph 3, "such a reaction" refers back to_______. 

A. "making a choice between 'flight' or 'fight'"                                                         

B. "reaction to stress both chemically and physically"                                                     

C. "responding to crises quickly"

D. "losing heart at the signs difficulties" 

In the last sentence of the passage, "do so " refers to ______.     

A. "expose ourselves to stress"                               

B. "find ways to deal with stress" 

C. "remove stress from our lives"                   

D. "established links between diseases and stress"

全能干細(xì)胞能夠讓植物在整個生命周期中產(chǎn)生新的器官，是植物生長發(fā)育的源泉和信號調(diào)控中心，但是到目前為止，人們對于干細(xì)胞組織中心建立和維持的機制仍然知之甚少。中國科學(xué)院遺傳與發(fā)育生物學(xué)研究所的李傳友課題小組發(fā)現(xiàn)了一個在植物根尖干細(xì)胞維持中起重要作用的基因，這一研究結(jié)果于2010年11月3日作為封面文章發(fā)表于國際著名雜志The   Plant  Cell上。下列說法不正確的是（    ）

A．植物全能干細(xì)胞分化形成不同組織細(xì)胞是基因選擇性表達(dá)的結(jié)果

B．植物全能干細(xì)胞有細(xì)胞周期，全能干細(xì)胞分化形成的導(dǎo)管細(xì)胞沒有細(xì)胞周期

C．植物全能干細(xì)胞分化形成根、莖、葉的過程一般是不可逆的

D．植物全能干細(xì)胞分化形成根、莖、葉的過程體現(xiàn)了細(xì)胞的全能性

全能干細(xì)胞能夠讓植物在整個生命周期中產(chǎn)生新的器官，是植物生長發(fā)育的源泉和信號調(diào)控中心，但是到目前為止，人們對于干細(xì)胞組織中心建立和維持的機制仍然知之甚少。中國科學(xué)院遺傳與發(fā)育生物學(xué)研究所的李傳友課題小組發(fā)現(xiàn)了一個在植物根尖干細(xì)胞維持中起重要作用的基因，這一研究結(jié)果于2010年11月3日作為封面文章發(fā)表于國際著名雜志The   Plant  Cell上。下列說法不正確的是（    ）

A．植物全能干細(xì)胞分化形成不同組織細(xì)胞是基因選擇性表達(dá)的結(jié)果

B．植物全能干細(xì)胞有細(xì)胞周期，全能干細(xì)胞分化形成的導(dǎo)管細(xì)胞沒有細(xì)胞周期

C．植物全能干細(xì)胞分化形成根、莖、葉的過程一般是不可逆的

D．植物全能干細(xì)胞分化形成根、莖、葉的過程體現(xiàn)了細(xì)胞的全能性

全能干細(xì)胞能夠讓植物在整個生命周期中產(chǎn)生新的器官，是植物生長發(fā)育的源泉和信號調(diào)控中心，但是到目前為止，人們對于干細(xì)胞組織中心建立和維持的機制仍然知之甚少。中國科學(xué)院遺傳與發(fā)育生物學(xué)研究所的李傳友課題小組發(fā)現(xiàn)了一個在植物根尖干細(xì)胞維持中起重要作用的基因，這一研究結(jié)果于2010年11月3日作為封面文章發(fā)表于國際著名雜志The   Plant  Cell上。下列說法不正確的是                           （   ）

A．植物全能干細(xì)胞分化形成不同組織細(xì)胞是基因選擇性表達(dá)的結(jié)果

B．植物全能干細(xì)胞有細(xì)胞周期，全能干細(xì)胞分化形成的導(dǎo)管細(xì)胞沒有細(xì)胞周期

C．植物全能干細(xì)胞分化形成根、莖、葉的過程一般是不可逆的

D．植物全能干細(xì)胞分化形成根、莖、葉的過程體現(xiàn)了細(xì)胞的全能性

What a strange man! He loves his wife, but _____ he often beats her.

A. at a time B. at one time C. at times D. at the same time

--Peter is very clever and he studies hard as well．

---No ______be always wins first in the examinations.

A．doubt  B．question  C．wonder  D．problem

You'd better make a mark _____ you have any questions.

A. at which  B. at where  C. the place  D. where