高中英语 课时分层作业2 Unit 7 The Sea 北师大版必修3

课时分层作业(二)

[语言知识练习固基础]

Ⅰ.单句语法填空

1．The room is 15 feet in length(long) and 10 feet in breadth.

2．With many things to deal(deal) with，I have to work day and night.

3．He was banned from driving(drive) for six months.

4．Giving advice at the right time has to involve a great deal of

intelligence(intelligent)．

5．The more he worked，the more energetic(energy) he became.

6．It took me an hour to find the solution to the problem.

7．His niece is attractive(attract) and mature for her age.

8．You can always make a living with a skill.

9．I advised them to watch out for slick spots on the sidewalk.

10．The information you gathered is of great help to me.

Ⅱ.完成句子

1．我们必须采取措施制止污染。

We must take measures to stop pollution here.

2．由男孩领路，我们很容易找到回家的路。

With the boy leading the way，we found the way back home easily.

3．你工作越努力，你就会取得更大的进步。

The harder you work，the greater progress you will make.

4．当心一个带着黑帽子的高个男人。

Watch out for a tall man with a black hat.

5．奥运会每四年举行一次。

The Olympics are held every four years/every fourth year．

[高考题型练习提能力]

Ⅰ.阅读理解

Far from the land of Antarctica(南极洲)，a huge shelf of ice meets the ocean.At

the underside of the shelf there lives a small fish，the Antarctic cod.

For forty years scientists have been curious about that fish.How does it live

where most fish would freeze to death？It must have some secret.The Antarctic is

not a comfortable place to work and research has been slow.Now it seems we have an

answer.

Research was begun by cutting holes in the ice and catching the fish.Scientists

studied the fish's blood and measured its freezing point.

The fish were taken from sea water that had a temperature of －1.88℃ and many

tiny pieces of ice floating in it.The blood of the fish did not begin to freeze until

its temperature was lowered to－2.05℃.That small difference is enough for the fish

to live at the freezing temperature of the ice­salt mixture.

The scientists' next research job was clear：Find out what in the fish's blood

kept it from freezing.Their search led to some really strange thing made up of a

protein(蛋白质) never before seen in the blood of a fish.When it was removed，the

blood froze at sea water temperature.When it was put back，the blood again had its

antifreeze quality and a lowered freezing point.

Study showed that it is an unusual kind of protein.It has many small sugar

molecules(分子) held in special positions within each big protein molecule.Because

of its sugar content，it is called a glycoprotein.So it has come to be called the

antifreeze fish glycoprotein，or AFGP.

【语篇解读】 你了解 the Antarctic cod(南极鳕鱼)吗？它们为什么在那么低的温度下仍能生存？其秘密在哪里呢？科学家会告诉你。

1．What is the text mainly about?

A．The terrible conditions in Antarctica.

B．A special fish living in freezing waters.

C．The ice shelf around Antarctica.

D．Protection of the Antarctic cod.

B [主旨大意题。从第一段第二句话 At the underside of the shelf there lives a small

fish，the Antarctic cod.和第二段第二句话 How does it live where most fish would

freeze to death？可推知B项最佳。]

2．Why can the Antarctic cod live at the freezing temperature?

A．The sea water has a temperature of －1.88℃.

B．It loves to live in the ice­salt mixture.

C．A special protein keeps it from freezing.

D．Its blood has a temperature lower than－2.05℃.

C [推理判断题。从第五段最后两句When it was removed，the blood froze at sea water

temperature.When it was put back，the blood again had its antifreeze quality and

a lowered freezing point.可知答案为C。]

3．What does the underlined word “it” in Paragraph 5 refer to?

A．A type of ice­salt mixture.

B．A newly found protein.

C．Fish blood.

D．Sugar molecule.

B [词义猜测题。从本段的Their search led to some really strange thing made up of

a protein(蛋白质) never before seen in the blood of a fish.可推知答案为B。]

4．How do the scientists carry out their research?

A．They stayed under sea water for observing the Antarctic cod.

B．By cutting holes in the ice and catching the fish.

C．By measuring their weight one by one.

D．By keeping the fish in a special lab.

B [细节理解题。从第三段首句Research was begun by cutting holes in the ice and

catching the fish.可知B项正确，其他选项与文章不符，故选B。]

Ⅱ.完形填空

I am a girl，but I was born to be a rebel(叛逆者)．I like games that can be

1 ．Some of the sports I like，even boys won't play!

Wrestling(摔跤)is 2 seen as a sport for men，but

I 3 to see if I could

do it.

Every Saturday morning，I got out of bed early to go and watch my brother

4 ．From morning to night，I would sit watching

the 5 have all the fun.Since

then，wrestling has been part of my 6 ．

For three years，I 7 all the boys and became the best player in the team.My

8 memory of wrestling is when a boy walked off 9 because he'd lost to a girl.

My last 10 was at this year's Girls' State Wrestling Championships.