Great changes ______ in my school in the past ten years.

Pretoria, South Africa – Hundreds of swimmers play in the water along a South Africa beach. Suddenly a huge shark appears off shore and heads for the bathers. Before it can get close to the swimmers, the shark, for some mysterious reason, starts swimming parallel to the beach. Then it turns away from the shore and heads out to sea, leaving the swimmers untouched.
Such a scene will soon become common along shark-in-fasted (鲨鱼成群的) shores. An electrical engineer from the University of Pretoria has developed an electrical system that repels (击退) sharks by controlling their movements. Confused by this action, the sharks end up turning away from the beach.
In this unusual shark-repellent method, an insulated (绝缘的) cable is buried on the bottom of the sea around a beach where people swim. When an electric current is sent through the cable, an electric field is produced in the water above the cable.
When shark swims into the electric field, nerve cells just below the shark' s skin will sense the field. The electricity produces a reflex (反射作用) action in the shark' s muscles, causing the dangerous animal to swim parallel to the cable. Confused by increasing loss of control of its muscles, the shark suddenly changes its direction and heads seaward, away from the electric field.
In a test of the invisible new shark-repellent system, a cable was placed around a beach in St. Lucia, an island around the beach a long time ago to keep sharks away from swimmers, and a net was left in place during the experiment.
When the electric field was left on for more than a year and a half, no sharks were found in the net. However, when the power was turned off,89 sharks ended up in the net.
Using the electric-wall method instead of net to protect bathers would avoid the needless death of many sharks, said biologists. Currently, thousands of sharks die each year when they become trapped in protective nets that surround holiday resorts in Africa and Australia.  About 10 to 15 humans are killed by sharks annually.
1．Why doesn' t the shark attack the swimmers according to the passage?
A．Because there are so many swimmers in the water.
B．Because the shark isn’t so hungry as to eat the swimmers.
C．Because of some mysterious power from the heaven.
D．Because there is an invisible electric field confusing the shark.
2．An electrical engineer from the University of Pretoria has developed __      .
A．a protective net   
B．a new shark-repellent system
C．the electric field        
D．an insulated cable
3．An electric field is produced in the water above the cable         .
A．only when a shark swims into the electric field
B．only when an insulated cable is buried on the bottom of the sea around a beach where people swim
C．only when an electric current is sent through the cable
D．only when the sharks are trapped in protective nets
4．Which of the following is NOT TRUE according to the passage?
A．Protective nets had been fixed earlier than the new shark-repellent system.
B．The new shark – repellent system will probably replace the protective nets.
C．Thousands of sharks have died each year since this new system was put into use.
D．Using the electric-wall instead of nets would avoid the needless death of many sharks.

Professor Martin's report says that children who attend a number of different schools, because their parents have to move around the country, probably make slow progress in their studies. There are also signs, says Professor Martin, that an unusually large number of such children are mentally affected.

　　The professor says, "It's true, my personal feeling is that children should stay in one school. However, our findings are based on research and not on any personal feelings that I or my assistants may have on the subject."

　　Captain Thomas James, an Army lecturer for the past 20 years and him self a father of two, said," I've never heard such rubbish. Taking me for ex ample, no harm is done to the education of my children who change schools regularly－if they keep to the same system, as in our army schools. In my experience, I've known quite a few of them－Army children are as well－adjusted（调整）as any others, if not more so. What the professor doesn't appear to appreciate is the fact that in such situations children will adapt（适应）much better than grown-ups."

　　When this was put to Professor Martin, he said that at no time had his team suggested that all such children were backward or mentally affected in some way, but simply that in their experience there was a clear tendency（倾向）.

　　"Our findings show that while the very bright child can deal with regular changes without harming his or her general progress in studies, the majority of children suffer from constantly having to enter a new learning situation."

　　1．According to this passage, Professor Martin's personal feeling_______.

　　　　A. is the opposite of what his report has shown

　　　　B. is in a way supported by his research

　　　　C. has played a big part in his research

　　　　D. is based on his own experience as a child

　　2．From the passage, we can conclude that Captain James's children_________.

　　　　A. have been affected by changing schools

　　　　B. go to ordinary State schools

　　　　C. can get used to the Army school education

　　　　D. discuss their education regularly with their father

　　3.About children and grown-ups, Captain James says that children______.

　　　　A. are generally well-adjusted

　　　　B. are usually less experienced

　　　　C. can adapt much more easily

　　　　D. can deal with changes quickly

　　4．According to Professor Martin, _________ suffer from changing schools regularly.

　　　　A. Army children

　　　　B. quite a few children

　　　　C. bright children

　　　　D. few children

Great changes ______in his hometown in the last twenty years.

I am a team leader in an insurance company. We are going through a lot of changes right now, which is   36  much stress for all of us.
A few weeks ago I was having a day so   37  that I even doubted if I had the ability to do this challenging work, and was about ready to change to a less stressful job   38  . Something happened that day to change my way of   39  and I am so appreciative of this young lady. I want to let her know that the small act   40  .
On the top of my cubicle (工作隔间) I have a small collection of lighthouses (灯塔) to let people know where I am sitting   41  my team members have to find me for emergencies.
That day I came into the office and was about to get the day   42  when Crystal came over. I asked if she needed anything. And she said, “I   43  you something.” I looked at her with a   44  look and said, “Well, thank you, but why   45  you buy me anything?” I had never spoke to this young lady   46 . She said, “Every day I stand up and look across the     47  and see your lighthouses. Then I feel I am not alone and I encourage myself that there are always   48  things in life. I saw this on the way to work and thought   49  would like it. I wish it would have the same   50  as your lighthouses do.” In her hand she had a small globe with a lighthouse and a ship on it. I gave her a hug and   51  her. I don’t think she knows how much that small act of   52  changed my day: I remained   53  the rest of the day.
For anyone that reads this, I hope you remember, no matter what the   54  is, you could change someone’s day,   55  even his views on life.