人教版高中英语选修8课时作业7：Learning about Language and Using Language

人教版高中英语选修8

Unit 2 Cloning

Learning about Language and Using Language

语言点温故练习

Ⅰ.单句语法填空

1．With the problem _______ (settle), we all felt happy.

2．You can borrow the book on condition ____ you do not lend it to anyone else. 3．The news ____ Tom would go abroad was told by Linda. 4．There is some doubt _______ he is the man who robbed the boy.

5．The students objected to ________ (study) on Sundays but their parents did not. 6．At that point, __ suddenly struck me that I was wasting my time. 7．Only by hard work can we bring our hometown back __ life.

8．Before Christmas, _________ are busy _________ the house with ___________.(decorate) Ⅱ.补全句子

1．Modern bicycles _____________________________ many major ways. 现代自行车在许多方面不同于早期的自行车。

2．We are supposed _______________________________ to lead a low-carbon lifestyle, which is of great significance.

我们应该承担过低碳生活的责任，这意义重大。

3．My persistence finally ________ when they called me in for an interview. 他们打电话来要我参加面试，我的坚持终于有了回报。

4．The reason ___________________________________ is that it costs too much. 他反对该计划的主要理由是它费用太高。

5．He ______________________ the base as a punishment.作为惩罚，他被禁止离开基地。 6．_____________ people doing whatever they want as long as they don't bother anyone else. 我支持人们做他们想做的事情，只要他们不妨碍别人。 7．_________________ we had really learnt a great deal there. 我突然想到我们在那儿确实学到很多东西。 8．Anyone would ____________ by such news.

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人教版高中英语选修8

任何人都会因为这样的消息而感到沮丧。

勤练高考题型

Ⅰ.阅读理解

Scientists have never known for sure whether dinosaurs were warm-blooded animals, like mammals and birds, or cold-blooded, like reptiles and fish.A recent study shows that in fact, many dinosaurs might not have belonged to either category (类别) but instead have fallen somewhere in the middle.

Warm-blooded animals have bodies that are able to make their own heat.Their body temperatures stay about the same whether it is hot or cold outside.Cold-blooded animals cannot make their own heat, so their body temperatures depend on how warm the outside temperature

is.Warm-blooded animals have much more active lifestyles than cold-blooded ones.

When scientists first discovered the bones of ancient dinosaurs in the 1800s, they were sure the huge creatures must have been slow.But as scientists found more bones of smaller, quicker dinosaurs, like Velociraptor, they realized that the creatures may have been much more active than they had thought.

A team of biologists began to examine.They knew that warm-blooded animals grow faster than cold-blooded ones.The researchers realized they could determine whether a dinosaur had been warm- or cold-blooded by finding its growth rate.

The scientists examined the growth rings in bones from 21 different dinosaur species.The width of these growth rings showed how much the dinosaurs grew each year, much like the rings in a tree trunk (树干) do.

“Our results showed that dinosaurs had growth rates that were actually not characteristic of warm-blooded or cold-blooded animals，” said Brian Enquist, a scientist on the research team.“They did not act like mammals or birds, nor did they act like reptiles or fish.” Instead, dinosaurs fell somewhere in between.Scientists call these middle-of-the-road creatures “mesotherms.”

Being mesotherms gave dinosaurs several advantages.They were faster and stronger than reptiles that had to rely on the sun for warmth.Being somewhat cold-blooded had its benefits too.Cold-blooded animals burn energy more slowly.So they need much less food to live than

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人教版高中英语选修8

warm-blooded animals.“It is doubtful that a lion the size of T．rex could eat enough to survive，” explains John Grady, another biologist on the research team.By being mesothermic, the dinosaurs could be both fast and big.

1．What is Paragraph 2 mainly about? A．The advantages of cold-blooded animals. B．The disadvantages of warm-blooded animals.

C．The differences between warm- and cold-blooded animals. D．The advantages of both warm- and cold-blooded animals. 2．According to the text, dinosaurs like Velociraptor ________. A．were bigger than the first discovered dinosaurs B．made scientists reconsider dinosaurs' behavior C．moved slower than the first discovered dinosaurs D．proved scientists were right about dinosaurs' behavior 3．It can be inferred that mesotherms grow ________. A．as slowly as cold-blooded animals B．as fast as warm-blooded animals C．slower than cold-blooded animals D．slower than warm-blooded animals 4．The text is mainly about ________. A．how dinosaurs disappeared B．the growth areas of dinosaurs

C．the appearance and behavior of dinosaurs D．if dinosaurs were warm- or cold-blooded animals Ⅱ.语法填空

Overhead bridges are now very common in cities.They are often built in places __1__ traffic is heavy and crossing the road is very dangerous.

Overhead bridges are used in very much the same way __2__ zebra crossings.They both serve a very useful purpose — to allow people __3__ (cross) the road safely and prevent unnecessary accidents and the loss of life.However, overhead bridges are more efficient when __4__ (compare) with zebra crossings.When people are crossing a zebra crossing, traffic is held

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人教版高中英语选修8

up.On the other hand, overhead bridges can help people cross the street without __5__ (disturb) the traffic.One disadvantage of overhead bridges is __6__ people have to climb up a long flight of steps.This is not very __7__ (convenience), especially to old people. Many overhead bridges __8__ (build) over the years.For their own __9__ (safe), people should be encouraged to use them instead of risking their life by running across the road.Old people may find __10__ a little difficult to climb up and down the steps, but at least it is much safer than walking across a road filled with dangerous moving traffic.

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