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．people use ________ to keep car engines cool．
| A．antifreeze | B．water | C．alcohol | D．ethylene glycol. |
The usual kind of antifreeze freezes at ________．
| A．0℃ | B．－18℃ | C．－22℃ | D．－40℃ |
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 |
Besides alcohol，________ is another kind of popular antifreeze．
| A．water | B．ethylene glycol | C．any chemical | D．any mixture |
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 |
Once a young man was travelling on a bike. He went a long way. At noon he felt very hungry. He wanted very much to find a restaurant to have a meal there， but he didn’t know where to find one. Just then an old woman was coming. “Maybe she knows，”he thought. So he came up to her and asked， “Hey， where is the nearest restaurant?”
“Sorry， I don’t know， young man.”
The young man was just going away when he heard the woman’s words， “Oh， yes， young man， you’ve just dropped something.”
The young man turned backed and asked， “What have I dropped something?”
“You’ve dropped your manners（礼貌）.”
| A．on foot | B．by plane |
| C．on a train | D．by bike |
| A．felt very thirsty | B．felt very hungry |
| C．didn’t want to walk on | D．wanted to turn back |
| A．have a rest | B．see an old woman |
| C．find something to eat | D．listen to the radio |
| A．give him something to eat |
| B．show him the way to the nearest restaurant |
| C．give him something to drink |
| D．have lunch with him |
| A．the young man was not polite |
| B．she didn’t feel hungry |
| C．she didn’t understand what the young man said |
| D．she was a stranger there， too. |
根据短文内容填表。
Look! This is my dog. His name is Cody. He is two years old. He is brown. This is his hair. It is gray. Isn’t it beautiful?
Hi, this is my telephone. It is called Mini. It is yellow. I like it a lot. You can call me at 85567789.
Name |
How old |
Color |
Other details(细节) |
Cody |
, beautiful |
||
Mini |
|
Number: |
Look at this. It’s a pencil case. It’s orange. It’s my pencil case. What’s in it? Look, this is a pen. It’s black. This is a pencil. It’s red. And this is a pencil, too. It’s yellow. This is an eraser. It’s blue and white. My pencil case is big and nice. I like it.
根据短文内容，选择正确答案。This is an orange ______.
| A．pencil case | B．pen | C．pencil | D．bag |
The pen is ______.
| A．red | B．black | C．green | D．white |
______ pencils are in the pencil case.
| A．Four | B．Three | C．Two | D．One |
______ is blue and white.
| A．The pencil case | B．The it |
| C．The pen | D．The eraser |
My pencil case is ______.
| A．big | B．nice | C．good | D．A and B |
配对阅读
E. Uncle Tom’s big house ---- Nice big house with four bedrooms, a living room, a kitchen, a bathroom and a dinning hall with a big garden. |
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