Antifreeze is a liquid(液体) that is added to water to keep it from freezing. When water freezes and turns to ice,it expands(膨胀). The force of water expanding is so great that it will break the hardest metal. Water is used in car engines(发动机) to keep them cool while they run,and if this water is allowed to freeze in winter it can break the iron block of the engine. That is why antifreeze is necessary.

Water freezes at 0℃;the usual kind of antifreeze will not freeze until the temperature is -40℃. A mixture(混合物) of five parts of water and four parts of antifreeze will prevent freezing at -18℃;four parts of water and five parts of antifreeze reduce this to -22℃.

Alcohol is a kind of good antifreeze,but when the air is running it becomes hot and the alcohol boils away,so it must be changed very often. Most people use antifreeze that does not boil away when the engine is running. There are several chemicals that do this. One of the most popular is called ethylene glycol.

66. People use ________ to keep car engines cool.

A. antifreeze  B. water  C. alcohol  D. ethylene glycol

67. The usual kind of antifreeze freezes at ________.

A. 0℃  B. -18℃  C. -22℃  D. -40℃

68. We use antifreeze in order to ________.

A. keep alcohol in water 

B. stop ice from becoming water

C. make the freezing point of water lower 

D. raise the freezing point of water

69. Besides alcohol,________ is another kind of popular antifreeze.

A. water  B. ethylene glycol  C. any chemical  D. any mixture

70. The text is written to ________.

A. tell us what antifreeze is  B. make people buy antifreeze

C. tell us that cars need antifreeze  D. show us how to protect car engines

 

High­climbing kid raises hopes

Michael McCarthy climbed to the top of the Willis Tower not long ago. The Tower stands 1451 feet(442 meters) tall,the highest building in the US.

As he got to the last step,McCarthy almost fell down,but that didn't stop him. The 14­year­old boy finally finished climbing the 2,109 steps and arrived at the top,where he enjoyed the cheers from the crowd.

“I just want to show people that if a kid with no legs can do it,anyone can do it,”McCarthy said.

McCarthy,who was born without legs,has to wear prosthetic legs(假肢) and use a set of crutches(拐杖) to walk. But McCarthy has a strong heart. He believes nothing can stop him from achieving his success.

He has been in a karate(空手道) school since he was four years old. When he decided to climb the Willis Tower,his karate teacher,Jeff Kohn,was moved and offered to help train him. They spent more than 10 hours practicing climbing stairs and keeping balance with the prostheses and crutches on the steps every day. “It seems that he never knows what tiredness is. Sometimes,I was so tired that I asked him to call_it_a_day,”said Kohn. “But he said he was still full of energy and wanted more exercise.”

Kohn was with McCarthy for the climb. “I saw the last 10 floors—he went faster,” said Kohn. “He's the most hard­working athlete I've ever trained.”

McCarthy said he was proud of himself and that the Tower now holds special meaning. “When I'm older,I'll point to the building and say ‘Look at this building I climbed’.”he said.

61. Why did McCarthy decide to climb the Willis Tower?

A. Because the Tower is very special.

B. Because he wanted to set a world record.

C. Because he wanted to show that anyone can do it.

D. Because he enjoyed climbing stairs very much.

62. Who helped McCarthy train for climbing the Willis Tower?

A. Nobody.  B. His brother.  C. His parents.  D. His karate teacher.

63. What does the underlined phrase “call it a day” mean in Chinese?

A. 结束当天的训练  B. 去打个电话

C. 再训练一天  D. 另请高明

64. Which of the following is True?

A. The Willis Tower is 442 feet tall in total.

B. McCarthy had a traffic accident and lost his legs.

C. While McCarthy was climbing the Tower,nobody was with him.

D. Many people cheered when McCarthy arrived at the top of the Tower.

65. What can we learn from this passage?

A. No man is born wise and learned.  B. Where there is a will,there is a way.

C. Time and tide wait for no man.  D. A little learning is a dangerous thing.

 

Sally and Tom are classmates. Here are their plans for next weekend.

Sally's plan

Saturday 9∶00 a.m.~10∶00 a.m.     take part in the English corner

4∶00 p.m.~5∶00 p.m.  have an art lesson

8∶00 p.m.~10∶00 p.m.  be at Alice's birthday party

Sunday 8∶00 a.m.~10∶30 a.m.  do some reading at home

3∶30 p.m.~5∶00 p.m.  draw pictures in the park

7∶00 p.m.~9∶30 p.m.  do my homework

Tom's play

Saturday 8∶00 a.m.~10∶00 a.m.     do my homework at home

4∶30 p.m.~5∶45 p.m.  play basketball

8∶00 p.m.~10∶00 p.m.  be at Alice's birthday party

Sunday 8∶20 a.m.~11∶00 a.m.  roller skate

4∶05 p.m.~5∶30 p.m.  climb the hill

7∶30 p.m.~9∶30 p.m.  watch TV

                           

56. Sally will stay in the park for ________ on Sunday afternoon.

A. one hour  B. two hours

C. one and a half hours  D. two and a half hours

57. Sally will be free at ________.

A. 9∶30 a.m. on Saturday  B. 4∶25 p.m. on Saturday

C. 10∶50 a.m. on Sunday  D. 4∶30 p.m. on Sunday

58. Tom will be ________ at 9∶25 on Saturday morning.

A. at home  B. on the playground

C. on the hill  D. in the park

59. Both Sally and Tom plan to________ next Saturday evening.

A. do some reading  B. do their homework

C. go to the English corner  D. go to Alice's birthday party

60. According to Tom's plan,we know he prefers ________.

A. drawing pictures  B. doing exercise

C. watching TV  D. reading books

 

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