Turn on the radio. A program will come out fr...

Turn on the radio. A program will come out from a broadcasting station miles and miles away. We know that sounds and music themselves couldn’t travel that distance through space .There must be something that brings the program from the station. But what is this silent carrier ( 载体) ?

This is known as radio waves. However, we can’t see them or even hear them. In fact, nobody knows exactly what they are. Nevertheless( 然而) ，we know that　 they are made by electricity .

At the broadcasting station, people talk, sing, play musical instruments or make many other sounds. These sounds are changed into electricity. Then from the broadcasting aerial (天线)of a tall tower , electricity sends out radio waves which travel　 in all directions .And some of them reach your radio aerial. What happens next is a magical thing. The radio waves start an electric current ( 电流) in your aerial like the one that was first made in the broadcasting station . Finally, the loudspeaker in your radio set changes the electricity into sound .Therefore, you hear the program.

根据材料内容选择最佳答案，将其标号填入题前括号内。

1.When you turn on the radio _________________.

A. you can see a program

B. you can hear a program

C. a picture will appear

D. you can feel the electric current.

2.The silent carrier that brings the program to you is called ____________.

A. radio set　　 B. sound waves

C. radio waves D. radio current

3.Electricity sends out radios waves from _________________.

A. the broadcasting aerial of a tall tower.

B. you radio set

C. all directions

D. a broadcasting station

4.The electricity is changed into sound by _______________.

A. the radio waves　　　　　　　　　　 B. the aerial

C. the radio program　　　　　　　　　 D. the loudspeaker

5.You may find this passage in a ______________.

A. guidebook

B. science magazine

C. fashion newspaper

D. fictional novel

九年级英语阅读理解中等难度题查看答案及解析

When we want to find out what the weather will be like tomorrow, we usually turn on the radio or TV. But in the time before radio and TV, people needed to forecast (预测) the weather. How did they do it? Let’s learn about two weather rhymes (押韵的诗) together.

Red sky at night, Sailor’s delight!

Red sky in the morning, Sailors take warning!

This weather rhyme was written a long time ago, but it still works today. As the sun is setting, a red sky at night usually means there are no clouds coming in from the west, a sign of good weather for tomorrow. But a red sky in the morning always means drier air is moving away to the east and moister air is moving in from the west. The moist air could bring clouds, rain and stormy weather.

When leaves show their undersides (底部), Be very certain, rain betides.

The rhyme shows us how trees forecast the weather. Tree leaves turn upside down just before it rains. In the period before a storm, strong winds can lift the leaves and show their undersides.

Animals, insects and plants are natural forecasters. When a summer storm is coming, you may notice that dogs, cows, horses, and geese grow restless (不安的) and frogs come out of their hiding places. These animals don’t have some sixth sense. Scientists think the animals can hear the low frequency (频率) sound waves made by thunderstorms many miles away.

Get outside and observe nature carefully, and soon you’ll be your own weather forecaster.

1.The underlined word “moist” can be replaced by the word “________”.

A.wet B.Cold C.warm D.clean

2.What is helpful for some animals to forecast the stormy weather?

A.Their sense of sight. B.Their sense of hearing.

C.Their sense of smell. D.Their sense of touching.

3.Which of the following is TRUE?

A.The two rhymes are both about winter weather.

B.When leaves show their undersides, it will be fine.

C.If you see a red sky in the morning, you can travel outside.

D.If you see a frog come out of its hiding place, you’d better stay at home.

4.What’s the writer’s main purpose in writing this passage?

A.To introduce two famous weather rhymes to us.

B.To tell us we should read as many rhymes as possible.

C.To show us the way to observe different animals.

D.To encourage us to get close to nature and observe the weather on our own.

九年级英语阅读单选中等难度题查看答案及解析

The boy is sleeping．Please　　　　　　 the radio．

A. turn up　　 B. turn off　　 C. turn on　　 D. turn out

九年级英语单项填空中等难度题查看答案及解析

INTERNATIONAL RADIO — WHAT’S ON?

1. How many times will the World News Program be on?

A. Once.　　　　 B. Twice.　　　

C. Three times.　　 D. Four times.

2.When can you phone in if you have a problem with your friend?

A. At 18:10.　　 B. At 19:00.　　

C. At 19:20.　　　　　 D. At 21:10.

3.In which program can you hear people’s opinions about hot topics?

A. Teen Dreams　　　　　 B. What Do You Think?

C. World Business　　　　 D. What Should You Do?

九年级英语阅读理解中等难度题查看答案及解析

The radio is too loud.  Will you please _______ ?

A. turn it down   B. turn it on  C. turn off it   D. turn it up

九年级英语单项填空简单题查看答案及解析

Don’t turn on the radio. Your father ______ now.

A. sleeps　　　　     B. will sleep　　     C. is sleeping　　         D. slept

九年级英语单项填空中等难度题查看答案及解析

—Do you mind if I turn off the radio?

-- __________. The good news will be on the air.

A.I’m afraid I do.　　　　　　 B.Of course not

C.Why not　　　　　　　　　 　 　　　 D.Yes, go ahead.

九年级英语单项填空中等难度题查看答案及解析

It’s spring now. New leaves come out from the tree. Everything begins to turn green. It makes us feel happy.

I watch the apple trees and remember a little story.

A long time ago, there was an apple tree and a little boy. The boy came and 　　 　　 around it every day. He climbed to the tree top, ate the 　　 　　 , and rest under the shadow (树荫). He loved the tree and the tree loved him. Time went by … The little boy 　　 　　 up and no longer played around it. The old tree was very sad. It didn’t know 　　 　　 . The boy said, “I am not a kid. I want to play with toys. But I don’t have money.”

“You needn’t 　　 　　 　 about it. Pick all my apples and sell them, you will have money.” After that the boy didn’t come back. Years later, the boy returned and the tree was happy. But 　　 　　 its surprise, the boy cut it down to build a house. Many years later the boy returned again. The old tree was happy and said to him “Sorry, my boy. I can’t give you 　　 　　 　 more. The only thing left is my dying roots. But you can sit down and rest here. This is your forever 　　 　　 .

This is a story of everyone. The tree is our parents. When we were young, we loved playing with them. When we grow up, we 　　 　　 them, and only come to them when we need something or are in trouble. No matter what happens, parents will be there and give what they have to make us 　　 　　 .

We may say the boy is cruel (冷酷的) to the tree but that’s how we are treating (对待) our parents. Nowadays, many old people feel lonely because their children don’t live with them. We hope all of us try to help those old people and manage to make the old have a happy life.

1.A．rest　              　　 B．played　　             C．play　　     　　　     D．eat

2.A．apples　　             B．leaves     　　     C．food    　　　　　　     D．birds

3.A．got         　　     B．set　         　　     C．grew　              D．took

4.A．what　　             　　 B．who　         　　 C．how　              D．why

5.A．worry　　             B．feel         　　     C．talk         　　　     D．dream

6.A．in　         　　     B．to　　　　　　　         C. on　     　　　　　　     D．of

7.A．something         　　 B．everything            C．nothing              D．anything

8.A．home             　　 B．tree　　             C．bed         　　　     D．place

9.A．love　         　　 　　 B．leave　             C．bring　　              D．hate

10.A．angry             B．tired　         　　 C．happy　              D．sad

九年级英语完型填空极难题查看答案及解析

Turn on the tap (水龙头) and the water comes out. Getting water is so______that you may think that there is an endless supply (供应量) of it. But it is not true. 70% of the earth is covered by water,_____ most of the water is salt water, leaving only a small percent of fresh drinking water. Some ____ including Italy, Spain and South Africa even buy water from other countries.

Each person in the UK uses about 150 liters of water a day. However, each person in some countries______uses 5-10 liters of water a day. We should help save water. Let’s have a look at ____ you can help:

Don’t leave the water running while brushing teeth. We brush our teeth twice a day and by turning the tap off when we brush, we_____ save 5-10 liters of water.

Don’t use the toilet_____ a wastebasket. Every time you flush (冲) used paper, waste food or other small bits of rubbish, ____ water is used.

Make use of _____ Collect rainwater in water buckets (桶) in your garden and use it to water your plants.

Reuse. Share bathwater with your family to reduce costs and water use. Or, set yourself a challenge to _____your shower time by 1 or 2 minutes.

1.A. fun　　 B. easy　　 C. important　　 D. necessary

2.A. so　　 B. but　　 C. though　　 D. because

3.A. countries　　 B. cities　　 C. towns　　 D. villages

4.A. almost　　 B. also　　 C. only　　 D. even

5.A. when　　 B. how　　 C. why　　 D. where

6.A. need　　 B. should　　 C. can　　 D. must

7.A. for　　 B. from　　 C. of　　 D. as

8.A. less　　 B. more　　 C. better　　 D. worse

9.A. rain　　 B. time　　 C. technology　　 D. imagination

10.A. cut up　　 B. cut off　　 C. cut out　　 D. cut down

九年级英语完型填空困难题查看答案及解析

The energy from the sun and wind is very cheap and it will never 　　　　 .

A. come out　　　　　　　　 B. put out

C. carry out　　　　　　　　 D. run out

九年级英语单项填空中等难度题查看答案及解析