If we are driving a car or crossing a street, we will stop when the traffic lights turn red. Why do we use red rather than other colors?
As we know, scattering (散射) happens when light goes through the air. For the same media, if the wavelength (波长) is long, the scattering will be short. If the wavelength is short, then the scattering will be long.
Of all light we can see red has the longest wavelength, so the scattering is the weakest. That means the red light travels far. In fact, it travels farther on rainy days.
Using the red light can help drivers in farther areas see the lights. It helps drivers slow down or stop in time. If drivers don’t see the red light until they are close, they may not be able to stop the car in time. An accident may happen. Red can also excite people. We can act more quickly when we see the color red.
In a word, red light helps drivers stop in time and help prevent accidents.______ has the longest wavelength of all light we can see.
| A．Red | B．Green |
| C．Yellow | D．Black |
Red light travels farther on ______ days.
| A．windy | B．sunny |
| C．rainy | D．cloudy |
Red can make people act more quickly because ____________.
| A．red can make people happier |
| B．the scattering of red is very short |
| C．the scattering of red is very long |
| D．red can make people more excited |
The passage mainly tells us ____________.
| A．why accidents happen |
| B．how the red light travels |
| C．why we use red traffic lights |
| D．how to stop in time at traffic lights |
完形填空
Some people think that all wild animals are dangerous. But in fact, very few of them will 1 a man if he leaves them alone. If you meet a lion or an elephant, I guess you will 2 ; but even a lion will avoid(躲避)a man if it is not very 3 . Lions and tigers only kill and eat men when they have grown too old and too weak to catch their usual 4 , such as deer and5 small animals. If you see a wild elephant, perhaps you will be 6 . However, elephants usually run away at once if you don’t attack them. Some animals get very frightened if they only smell a man, some stand and look at him for a moment 7 they run away, some take no notice at all but walk away 8 in another direction. Wild animals only attack 9 when they are afraid that people want to harm(伤害) their 10 , or when the hunters shoot at them and make them angry.
|
|
|
|
|
|
|
|
|
|
Do your parents ever say, “act like a lady” or “be a gentleman” to you? But in the eyes of today’s teenagers, what should a lady or a gentleman be like? Let’s take a look.
What is a gentleman? The girls have their ideas:
Huang Xiaoyu of Guizhou: A gentleman doesn’t always get angry. He wants others to be well and happy. He is always ready to help. There is a boy in my class and I think he is a gentleman. If I don’t do well in the English exam, he will say, “You will do better next time.” That makes me feel happy.
Chen Tingting of Shenzhen: A gentleman always says, “Ladies first” When students clean up the classroom, he does the heavy work. He lets girls go into rooms first. There are no gentlemen in my class. When there is something to eat, the boys in my class always get them before girls !
What is a lady？ Boys tell us what they think a lady is:
Wu Yifan of Dalian: A lady is quiet and kind, but she’s not shy(害羞) and she can talk about her ideas in front of others. To me, Dong Jie, a film star, is a lady. She is pretty and she kind. She does a lot for others.
Wang Lichao of Tianjin: A lady is not just beautiful but clever. She never says bad words. She is quiet and kind to others. I don’t think there is a lady in my class. Most of the girls are “wild beauties”, I think. A gentleman doesn’t ________.
| A．care about others’ feeling |
| B．always say “ladies first” |
| C．do the heavy work |
| D．get angry easily |
What does Huang Xiaoyu think a gentleman will do if she doesn’t do well in the English exam?
| A．He will say “You’ll do better next time” |
| B．He will get angry |
| C．He will say “You’re so careless.” |
| D．He will laugh at her |
Why does Wu Yifan think Dong Jie is a lady?
| A．Because she is quiet. |
| B．Because she likes expressing(表现) herself |
| C．Because she is pretty and kind. |
| D．Because she is very shy. |
Which of the following is TRUE according to this passage?
| A．Wang Lichao thinks pretty-looking is enough for a lady. |
| B．Huang Xiaoyu thinks there is a gentleman in his class |
| C．Chen Tingting thinks there is a gentleman in his class |
| D．Wu Yufan thinks a lady can’t talk about her ideas in front of others. |
What does the underlined words “wild beauties” mean in this passage?
| A．Beautiful and kind girls |
| B．Pretty- looking but rude girls |
| C．Gentle and shy girls |
| D．Clever girls |
Many parents today worry about their children's diets. Then what is a healthy diet for children? Miss Jones from Happy Children Hospital gives the following advice:
◆Children shouldn't eat food with too much salt, because it can cause high blood pressure(高血压).
◆Children should eat food with less fat, oil and sugar. They should not eat too much junk food.
◆Fruit and vegetables are rich in vitamins. Children need to eat fruit and vegetables often.
◆Water is important to everyone. Children need to drink enough water every day.
◆Children need to eat breakfast every day. It is good for their bodies and minds.Miss Jones is possible a _______________.
| A．teacher | B．doctor |
| C．shop assistant | D．a waitress |
What does the underlined word " junk food " mean in Chinese?
| A．绿色食品 | B．垃圾食品 | C．天然食品 | D．营养食品 |
According to Miss Jones, children should drink__________ every day.
| A．enough juice | B．enough water |
| C．enough coffee | D．enough milk |
Which kind of food is rich in vitamins?
| A．water | B．junk food |
| C．sugar | D．fruit and vegetables |
What is the best title of the passage?
| A．Bad Habits | B．Junk Food |
| C．Advice on a Healthy Diet | D．An Unhealthy Lifestyle |
Some children are flying kites near the river. They are very high and Peter can see them from the classroom. After lunch his aunt comes to see his mother and brings a kite to him. It looks like a bird. He wants to fly it but his mother doesn’t let him do that.
“It’s time to go to school,” says his mother, “You can fly it after dinner.”
The boy is unhappy, and says goodbye to his aunt and leaves. Now he is in the classroom but he doesn’t listen to Miss Black. He only thinks how to fly the kite. Miss Black writes something on the blackboard and then turns to the class.
“Name nine things with milk in them, Peter.” she says.
The boy doesn’t hear her and still sits there. A boy in Row 4 beats(敲打)his back and he knows it. He stands up and Miss Black asks him the question again. He thinks for some time and then says, “Yes, madam, tea, coffee, cake and …er…six cows(奶牛).”There is _____ near Peter’s school.
| A．a bank | B．a river | C．a lake | D．a park |
In the classroom, Peter can see ______.
| A．some children swimming in the park |
| B．his aunt buy a kite for him |
| C．some students reading beside the lake |
| D．some children flying kites near the river |
_____ comes to visit his mother after lunch.
| A．Peter’s teacher | B．Peter’s friend |
| C．Peter’s cousin | D．Peter’s aunt |
Peter’s mother tells him to fly the kite ________.
| A．at breakfast | B．in the classroom |
| C．after dinner | D．in school |
In class, Peter only thinks ______.
| A．his teacher’s words |
| B．what the kite looks like |
| C．how to fly the kite |
| D．how to answer the teacher’s question |
√=like × =" doesn’t" like
| Activities Names |
Play basketball |
Read comic books |
Fly kites |
Play Computer games |
| Millie |
× |
√√ |
√√ |
√ |
| Alice |
× |
× |
√√ |
√ |
| Peter |
√√ |
√√ |
× |
√ |
| Kate |
× |
√√ |
√√ |
√ |
| Tom |
√√ |
√ |
× |
√ |
All the boys and girls like______.
| A．playing basketball |
| B．reading comic books |
| C．flying kites |
| D．playing computer games |
______ like flying kites.
| A．Alice and Peter | B．Kate and Alice |
| C．Kate and Millie | D．Millie, Alice and Kate |
_______doesn’t like reading comic books.
| A．Alice | B．Peter | C．Tom | D．Kate |
No girls like________________ .
| A．playing basketball | B．reading comic strips |
| C．flying kites | D．playing computer games |
________ and________ have the same likes and dislikes.
| A．Alice; Kate | B．Peter; Millie |
| C．Millie; Kate | D．Millie; Tom |