Men have always wanted to fly like birds. Bir...

Men have always wanted to fly like birds. Birds can fly easily because they are light，but men's bodies are heavier.

Men first went up into the air in balloons. These were big bags，and they were filled with gas. Hydrogen (氢气) is a useful gas for balloons. It is lighter than air. Helium is also lighter than air，but it costs a lot of money. So balloons are usually filled with hydrogen.

Balloons have to fly with the wind as they have no engines (发动机) to drive them. Later，men made airships. They are balloons with engines. They are also filled with hydrogen.

Aircrafts (飞机) with wings now take people across the world. Powerful engines drive these machines across the sky. Some of the engines are like the engines of cars，but they are more powerful.

There is another kind of engine，we call it the jet (喷射) engine. An English engineer invented the jet engine. At the same time，Germans were also building a jet engine. In May 1941，the English engineer's new engine was fixed in an aircraft，and the aircraft flew quite well.

Jet engines are very powerful. Usually two to four are enough for an airplane，but some big aircraft need six. Anyone in a moving jet plane can feel the power of the engines. Jet planes can travel faster than sound. As a flying jet plane leaves its noise behind，we do not hear it until it has gone.

1.According to the passage，men can't fly like birds because　　　　　　 .

A.men don't have aircraft

B.men's bodies are too heavy

C.men don't like birds

D.men's bodies are too light

2.The underlined word“Helium”in the second paragraph is mostly like a kind of　　　　　　 .

A.bag　　　　 B.airplane　　　　 C.gas　　　　　 D.balloon

3.We don't hear the flying jet plane's noise until it has gone because　　　　　　 .

A.jet planes are very powerful

B.jet planes have enough jet engines

C.anyone can feel the power of the engines

D.jet planes travel faster than sound

4.Which of the following is NOT true according to the passage?

A.Men first flew up into the air in balloons.

B.The first jet plane was invented by an English engineer.

C.1ne let engine is very powerful.

D.Two let engines are enough fot a big aircraft.

八年级英语阅读理解中等难度题查看答案及解析

Canadian Geese are large blue and white birds. When autumn comes, they have to fly south where the weather is warmer. The winters are so cold in Canada that the birds will die if they stay there.

Last spring, Bill Lishman found sixteen young Canadian Geese on his farm. They had lost their parents. Bill thought, “These young birds won 't know what to do in the autumn.”He had a small plane and he decided to teach the birds to follow him. all through the summer, he went on short trips in his plane and the young geese flew after him.

When the cold weather arrived in the autumn, Bill flew to Virginia in the United States, 600 miles south of his home in Canada. The geese followed him all the way. Bill left the geese in Virginia and he returned home.

This spring, Bill was waiting for the birds to come back. They didn't arrive, so Bill flew to Virginia to get them. He looked for them for two weeks, but he couldn't find them. When he arrived back home, he found the geese waiting for him. They had found their way home without him!

1.Canadian Geese have to fly south when autumn comes because________.

A.they. want to find their parents

B.they like to travel from the North to the South

C.they want to find a new home

D.they will die in the cold winter in Canada

2.How many young Canadian Geese did Bill Lishman find on his farm?

A.14 B.15 C.16 D.17

3.According to this passage, we can see Bill Lishman is________.

A.outgoing B.kind C.interesting D.excited

4.Which of the following sentences is true?

A.Virginia is in Canada.

B.Bill looked for the young Canadian Geese for one week.

C.The young Canadian Geese had found their way home without Bill.

D. The young Canadian Geese came back to the farm in summer.

八年级英语阅读单选中等难度题查看答案及解析

根据句子意思，用括号中所给单词的适当形式填空。

1.If you can go closer to the birds, you can _______ (easy) watch them.

2.He looks very sad because of his 　　　　　　　　 (ill).

3.You can’t find many cranes here, because they live in much _____________(wet) place.

4.Every year many 　　　　　　　　 (tour) come to visit the Great Wall.

八年级英语单词拼写中等难度题查看答案及解析

根据句意，用所给词的适当形式填空。

1.If you can go closer to the birds, you can _______ (easy) watch them.

2.If we do nothing, there will be no pandas __________(leave).

3.His ____________(ill) is very serious, the doctor is saving his life.

4.Would you please speak a little __________(loud)?Ｉcan’t hear you.

5.I like autumn, because it’s always　　　　　　　　　　 (sun).

八年级英语补充句子中等难度题查看答案及解析

根据句意，用所给词的适当形式填空。

1.If you can go closer to the birds, you can _______ (easy) watch them.

2.If we do nothing, there will be no pandas __________(leave).

3.His ____________(ill) is very serious, the doctor is saving his life.

4.Would you please speak a little __________(loud)?Ｉcan’t hear you.

5.I like autumn, because it’s always　　　　　　　　　　 (sun).

八年级英语单词拼写中等难度题查看答案及解析

阅读并回答问题

Birds can fly and bats can, too. But, is a bat a kind of bird? No, a bat is not a kind of bird. They are different animals.

A bat has four legs. A bird has only two. Bats have teeth and birds have no. Bats have large ears but bird's ears only holes in the head.

All bats like to eat insects(昆虫). They eat at night and sleep in the daytime. In the evening bats are busy flying and catching insects. Its legs help it to fly. The piece of skin(皮肤)joins them together. It is just like a wing.

Some people think bats can't see. In fact it is not true. Bats have eyes, but they cannot see well. Bats have better ears than men have. They can hear things which people can't. They can feel where a thing is.

That is why the bats can fly about in the evening.

根据短文内容,回答下列问题。

1.Is a bat a kind of bird or a kind of animal?

__________________________________

2.What’s the difference between bat's and bird's ears?

__________________________________

3.Why can bats fly about in the evening?

__________________________________

4.Can bats feel where the thing is ?

__________________________________

5.What helps bat fly?

__________________________________

八年级英语回答问题中等难度题查看答案及解析

Birds can find food _____ now than before.

A. easy　　　　　　 B. easier　　　　　　 C. easily　　　　 D. more easily

八年级英语单项填空简单题查看答案及解析

Zhalong is an ideal home for wildlife . Many birds can find food ____ there .

A. too easy        B. easily            C. easier                D. easy

八年级英语单项填空中等难度题查看答案及解析

Zhalong is an ideal home for wildlife . Many birds can find food ____ there .

A. too easy        B. easily            C. easier                D. easy

八年级英语单项填空中等难度题查看答案及解析

Zhalong is an ideal home for wildlife. Many birds can find food____ there.

A. too easy B. easily　 C. easier D. easy

八年级英语单项填空中等难度题查看答案及解析