句型转换。
请根据要求改写下列句子，每空一词。
1.Jack’s already back from work.（改为一般疑问句）
_______ Jack back from work _______?
2. Some very large dinosaurs weighed over 100,000 kilograms.（对划线部分提问）
_______ _______ did some very large dinosaurs weigh?
3.He has changed his diet. He wants to be healthier.（合并为一句）
He has changed his diet _______ _______ to be healthier.
4.It was raining very heavily last night.（改为感叹句）
_______ _______ the rain was last night!
5. In Switzerland, the government doesn’t allow people to cut down trees.（改为被动语态）
In Switzerland, people _______ _______ to cut down trees.
请根据句意从方框中选择合适的动词，并用其适当时态填空，使句子通顺。
stand ride pass sit smell not arrive |
1.No matter how nice this fruit _________ , I prefer not to eat it.
2.---Be careful not to fall into the river.
---Thank you, we didn’t know we_____ so close to it.
3.More than a year __________ since we moved to this new town.
4.--- May I see your ticket, please? I think you _________ in my seat.
--- Oh, sorry. My seat is upstairs.
5.He set off early in the morning but ____________ till late in the night.
6.—Could you tell me how your daughter usually goes to school?
—Yes. If it is fine, she ____________ to school.
请根据句意从方框中选用合适的词，并用其适当形式填空，使句子通顺。
mouse happy bad heavy forty she far |
1.He has to ask for a third job because he has five _______ to feed.
2.Susan is coughing terribly. She has never had a _________ health condition.
3.Working for _______ meant that she could be her own woman.
4.What a hot day! The temperature must be in the _______ today.
5.Which one is from the Mars, the earth or the sun?
6.The man was breathing and had blood on his shirt.
7.Many students are with too much homework. They need more time for their hobbies.
请根据括号中的中文提示，英文释义或句意，写出句中所缺单词，使句子通顺。
1.More and more families have their own cars. They have changed people’s (everyday) life greatly.
2.The _______(疲劳的，累的) tourist fell back on the bed and at once fell asleep.
3.One of the first _________ (欧洲人) to discover America was Christopher Columbus.
4.The sunrise on top of the mountain is such a wonder that no words can _______ it.
5.Listening to music can make you forget your __________ (悲伤).
6.Though he has lived______(in a foreign country) for many years, he likes Chinese dishes best.
7.All the people in the village won’t (trust) what the little boy says, because he always tells lies
When I was a boy, I belonged to the Boy Scouts (童子军), so I used to go camping every summer, and once something happened which I have never been able to explain.
We were camping in a place above a river. After arriving, we all rushed down to the river and had a swim. Standing by the river, we noticed that it was surrounded (环绕) by cliffs (悬崖). If someone wanted to reach the river at this point, he had to walk past our camp.
Several days later, the scoutmaster had to be away for a day. That afternoon, we had supper early. We were sitting round the fire, eating and talking, when a man walked past and went down towards the river. We all felt that this man looked very strange, but, because each of us was afraid of looking very stupid, no one said anything.
We ate rather slowly, taking as long as possible. After finishing, we collected our plates together so that we could take them to the river where we always washed them. But no one moved towards the river—we stood looking at each other ashamed. Then all shouting at once, we began talking about the man who had walked past us. We agreed how strange he looked and we wondered what he could be doing by the river. We knew that he could only return by passing through our camp.
An hour passed. Then one of the boys suggested we should creep (悄悄移动) down by the river so that we could see what the man was doing. Moving very slowly and keeping in the shadow, we crept down towards the bank. One boy climbed a tree so that he could see everything clearly. He called to us that there was no one there, so we ran down to the bank, looking everywhere carefully. We could not understand where the man had gone.
When it got dark, we went back to our camp feeling bewildered. We told the scoutmaster what had happened in the evening. Smiling, he doubted if we had seen the man, but finally suggested we go and look again. We did, but there was no one there.
Many years have passed, but I still remember it as if it were yesterday. What did we see? I do not know.
1.The writer in the text mainly tells us .
A. the story of his childhood
B. about a stranger by the river
C. a strange camping experience
D. about a good place for camping
2.Why did the boys eat their supper slowly?
A. They were talking while eating.
B. They had a supper earlier than usual.
C. They were waiting for their scoutmaster.
D. They wanted to see the strange man by the bank later.
3.The word “bewildered” in the text probably means “ ”.
A. 惭愧的 B. 胆怯的 C. 迷惑的 D. 兴奋的
4.When he heard what had happened, the scoutmaster .
A. realized who the man was
B. could hardly believe the boys
C. went back to look for the man
D. started to worry about the man
5.The writer still remembers the event because .
A. the boys acted foolishly
B. the camping place is beautiful
C. no one could explain the event
D. he enjoyed his camping that summer
Scientists have long believed one way to stop the Earth’s air from warming is by planting more trees. The idea is that more trees will take in or absorb(吸收) some of the CO2 in the air. CO2 is a gas released by cars, factories and other human activities. The gas traps heat in the Earth’s air, which warms the planet. However, two new studies have found that trees may not be as helpful in reducing CO2 as thought.
The first study was done at Duke University in Durham, North Carolina. Researchers pumped(打气) extra CO2 into a test area where green trees were growing. The trees grew thirty-four percent faster during the first three years. However, in time, the trees slowed to about their normal growth rate. The scientists say this is because trees need other nutrients(营养素), such as nitrogen(氮).
In the second study, researchers from Duke and Bowdoin College in Brunswick, Maine examined the soil(泥土) around trees. They discovered that as the leaves broke down into the soil, all the carbon was not trapped in the soil. Much of it was let into the air as CO2.
The findings of the two studies were published last month in Nature magazine. They suggest there is limited(有限的) value in planting trees to reduce the CO2 pollution in the air.
Forest planting has been a part of negotiations(谈判) on a world agreement to reduce greenhouse gases that scientists believe cause global warming. The United States, Canada, Japan and some other countries have supported the idea. But this new research suggests the idea is not as effective as environmental activists(积极分子) had thought. Scientist Ram Oren of Duke University led the study on tree growth. He says that earlier estimates(估计) on the ability of forests to absorb CO2 were overly hopeful.
Some other scientists say the research provides some of the first evidence on how trees react(反应) to CO2. Some other scientists say the research disputes(质疑) a belief among some coal and power companies. The companies say that more CO2 in the air will not create harmful global warming. Instead, they say it will increase forests and other plants.
1.Why did the researchers put trees in extra CO2 in the first study?
A. To learn whether trees can still absorb CO2 under extreme conditions.
B. To get more oxygen from these trees.
C. To know how much CO2 that trees can absorb.
D. To see the effect of CO2 on the growth rate of these trees.
2.What happened to the leaves falling from the trees in the second study?
A. They broke down and the main parts turned into oxygen.
B. They broke down and the carbon had mainly turned into CO2.
C. They broke down and the carbon was mainly absorbed in the soil.
D. They absorbed more CO2.
3.Scientist Ram Oren thinks that common beliefs of the tree’s ability to absorb CO2 are __________.
A. just right B. not acceptable
C. a bit too cheerful D. too dangerous
