Put an ice cube from your fridge into a glass of water. You have a piece of string(线) 10 centimeters long. The problem is to take out that piece of ice with the help of the string. But you must not touch the ice with your fingers.

You may ask your friends to try to do that when you are having dinner together. There is a saltcellar on the table. You must use salt when you carry out this experiment.

First you put the string across the piece of ice. Then put some salt on the ice. Salt makes ice melt(融化). The ice round the string will begin to melt. But when it melts, it will lose heat. The cold ice cube will make the salt water freeze again.

After a minute or two you may raise the piece of string and with it you will raise your piece of ice!

This experiment can be very useful to you. If, for example, there is ice near the door of your house, you must use very much salt to melt all the ice. If you don’t put enough salt, the water will freeze again.

61. We must use _______ when we carry out this experiment.

A. fridge             B. some food                   C. a table     D. some salt

62. How long will it take to carry out this experiment?

A. More than three minutes.           B. Five minutes or so.

C. Only one minute or two.               D. About ten minutes.

63. What is the task of this experiment?

A. Put the ice cube into the glass of water with the help of the string.

B. Take out the ice cube in the glass of water with the help of the string.

C. Take out the ice cube in the glass of water with your fingers.

D. Put some salt on the ice cube and then put the string across it.

64. How many things at least are used in this experiment?

A. Three.              B. Four.                    C. Six.                  D. Seven.

65. We can learn something about _______ from the passage.

A. physics          B. biology         C. chemistry        D. maths

W:  Well, I’d like to think about the chair. But it’s not exactly what I had in mind.

M:  I can assure you that you won’t find anything more reasonable or more comfortable.  1.

W:  I’m worried about the color.  2. 

M:  Oh, it washes very easily. A little soap and water will remove any spots.

W:  Well …

M:  Look, a few weeks ago another customer had his doubts when I suggested that he buy one of these chairs. But do you think he brought it back? No way! In fact, he called me up and ordered another one.

W:  It is comfortable.

M:  There is no doubt about it. But the decision is up to you.  3. Of course, I can’t guarantee that chairs will still be here.

W:  4. 

M:  The last one in stock.  5.

     water will make the fish in the pond       .

A．Polluting; die away                      B．Being polluted; die off

C．Polluted; die out                        D．Pollution; die down

Tilly Smith, the 11-year-old British girl, who was called as “Angle of the Beach”, saved 100 tourists from a Thai beach hit by the tsunami① in 2004 and has been named Child of the Year by readers of a French children’s newspaper.

She came ahead of a South African Aids orphan, a six-year-old girl who survived a kidnapping② and a young Parisian pop singer to win the Mon Quotidien award. Tilly had studied tsunamis with her geography teacher, Andrew Kearney, shortly before flying to Thailand for a holiday with her parents and younger sister last year. As she watched the waves suddenly begin to move back, and the sea was bubbling③, she warned her mother, Penny, that the beach was about to be struck by a tsunami. Mrs Smith and her husband, Colin, warned other holidaymakers and hotel staff and scores of people were cleared from Maikhao beach at Phuket.

Tilly, now 11, and back in Thailand for anniversary commemorations④ of the disaster, said: “It’s really good, just to know about tsunamis or any natural disaster in case you are in one. I’m very glad that I was able to say on the beach that a tsunami was coming. And I’m glad that they listened to me.”

Tilly is unaware of her great popularity among French children. Her picture appears on the front page of Mon Quotidien, which is read by 10 to 14-year-olds.

“Our readers chose Tilly because they could identify with her,” said Francois Dufour. “To be a pop star at 11 seems impossible, and the idea of having Aids or being kidnapped is far from their lives.”

1. The passage mainly wants to tell readers that ______.

  A. a little girl saved 100 tourists out of a tsunami

B. British “Angle of the Beach” was named Child of the Year

  C. many people came for anniversary commemorations

  D. the tsunami was able to be avoided

2. The underlined words “Mon Quotidien” (in Paragraph 4) should be the name of ______.

  A. a magazine      B. a book       C. a novel       D. a newspaper

3. Which of the following about Tilly Smith is TRUE?

  A. She could make full use of her knowledge from books.

  B. She was ever kidnapped by a pop singer.

  C. She visited Thailand by boat with her parents.

  D. She had expected to attract the French children.

4. According to the Tilly Smith’s knowledge, when there is a tsunami, ______.

  A. the sea water will not be clear         B. the sea will be bubbling when moving back

  C. the sea water will make great noise     D. the sea will be bubbling when moving forward

It will be hot—hot enough that most locals will have cleared town for cooler places. But because athletes competing at the 2004 Olympics have no choice but to stay in the hot weather, many plan to turn to science to stay cool.?

Some will put their hands in ice water just before competing and nearly all will be wearing fabrics(织物) designed with hot weather in mind.?

“Normally we warm up before exercise,”said Gordon Sleivert, director of sports science and medicine at the Canadian Sport Center in Victoria, British Columbia.“But in this case we're taking the warm out of warm up. It's like pre-cooling.”

Experts are predicting(预测) the average high this August in Athens will be 90 degrees Fahrenheit, with temperatures often reaching above 100(the average temperature in Sydney for the 2000 summer games was 64).?

Although some events, such as the marathon, will start early(1 a.m.) to avoid hot weather, other competitors will be pushing their limits during high temperatures.?       Drinking lots of water will help athletes keep cool, but humidity(湿度) remains a problem. The body's ability to cool down is weakened by damp air since sweat drips off the skin rather than evaporates(蒸发),resulting in dehydration(脱水) without the cooling.?

“Getting hot is a real problem because when our brains heats up, the brain waves are more like when you're really sleepy. Everything feels harder,” said Sleivert.

The passage mainly tells us that _______.

A. why it is very hot in Athens?

B. the hot weather is a big problem for Olympic athletes?

C. how important science is to every athlete?

D. the Olympics will be put off because of the hot weather?

The underlined sentence “other competitors will be pushing their limits during high temperatures”in the fifth paragraph means _______.?

A. Olympic athletes will put off their competition time?

B. some events in the Olympics will have to be put forward?

C. competitors can't reach their limits in the hot weather?

D. competitors will have to try their best to compete under any condition?

The following things will be likely to happen in the hot weather EXCEPT _______.

A. dehydration?

B. being sleepy?

C. that the blood in the body can become less and less?

D. that the body's ability to cool down is weakened