What do people do with their old, out-of-date but still useful computers? Most people don’t know what to do with them. Many old computers are put away in homes. Many more are simply thrown out with the rubbish.
Finally, some companies are thinking of ways to bring down the number of old computers. Sony has agreed to help recycle old Sony products（产品）. Dell, Hewlett-Packard and other companies now also take back some old computers.
In some countries, laws（法规）are being passed, too. Computer companies will have to pay for collecting and recycling their used products. And 70% of computer waste must be recycled. The idea behind the laws is that computer companies themselves should pay the cost. That will encourage them to make computers that are easier and cheaper to repair and upgrade（升级）.
Yet while many people are throwing away good computers, others cannot afford them at all. Hundreds of organizations（组织）are working to solve this problem. They collect and repair old computers. Some also teach others how to repair computers.
The computers then go to schools, charities（慈善团体）and people who need them. Giving a used computer to one of these organizations can turn one person’s rubbish into someone else’s useful things—and cut down on waste, too.What do many people do with old computers?
| A．They repair them. | B．They sell them. |
| C．They send them to others. | D．They stop using them. |
How many computer companies are mentioned in the second paragraph？
| A．One. | B．Two. | C．Three. | D．Four. |
According tothe laws in some countries, computer companies must .
| A．collect and recycle most of their products | B．collect all their used products |
| C．repair and upgrade old computers | D．make more cheaper computers |
What do the organizations do to solve the problem of old computers?
| A．Help the computer companies to collect them. |
| B．Repair and send them to those who need them. |
| C．Help people to learn to use them. |
| D．Turn rubbish into useful things. |
What is the main idea of this passage?
| A．Repairing old computers. | B．Encouraging to make cheap computers |
| C．Recycling old computers. | D．Helping those who need computers. |
IQ（intelligence quotient智商）is a score that shows a person’s level of intelligence.
People used to believe that some people are born with a high IQ and some aren’t.
32 , a study by scientist at University College London has challenged（挑战）this idea. According to an article last October on the Journal Nature, scientists are beginning to think that our IQ is not a constant（不变的）score.
The scientists tested 33 healthy young people in 2004 between the ages of 12 and 16. Then they did tests again four years later, when the same people were between 16 and 20.
Scientists found big changes in the IQ scores between 2008 and 2004. Some 33 and some fell 34 as many as 21 points.
To test whether these scores were meaningful, the scientists compared them with results from brain scans（扫描）. They found that the IQ changes matched changes in the structure（结构）of the subjects’ brains. “A change in 20 points is a huge 35 ,” said Professor Cathy Price, who led the research. He said it could mean the difference between an average and a 36 person. The team has not found a clear cause for these changes. However, they say it is 37 that education plays a role in changing IQ.
“Here we have shown that children’s 38 is likely to be still developing, ” says Price. “We have to be careful not to write off 39 performers at an early stage. In fact, their IQ may improve in a few more years. ”
A．And B．However C．Besides D．Though
A．rise B．rose C．raise D．raised
A．of B．with C．by D．from
A．difference B．matter C．thing D．meaning
A．successful B．gifted C．able D．rich
A．natural B．true C．certain D．possible
A．score B．intelligence C．skill D．interest
A．clever B．prettier C．nicer D．poorer
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