以下为课件内提取的文本内容，仅供参考：

Unit 2 crossing limits

World map exploration

Columbus was Spanish sailors.

He made four voyages . He was

the first man who discovered

Amercia.

James Cook was a British captain.

He made maps of Australia and

New zealand

Who were the real explorers long before?

2. How many Chinese explorers are mentioned in the text?

Chinese merchants

Silk road

spices, glass

India, the Middle East , Rome

Han Dynasty

Gan Ying

Over land

rhinoceros

horns

the East Rome Empire

Dang Dynasty

Du Huan

By boat

China

Song Dynasty

the Africans

By boat

A bronze statue of a lion

China

Ming Dynasty

Zhenghe

By fleet

giraffes,zebras, shells, elephant ivory…

Africa

India-------the middle east-----Rome

Silk road

coasts of India Ocean---Ceylon(Sri Lanka)

1. Why did people of the Han Dynasty know about Africa?

2. What happened to the Swahili kingdoms and the islands off the African coast after Gan Ying’s travel?

Ceylon, was the place where Chinese merchants met with Arab merchants and heard about the westernmost lands.

They developed into the world’s trading center for ivory, spices,rhinoceros horns and so on.

4. What led to the meeting between black people and a Chinese?

5. Who was Du Huan? What did he write?

6. What did it mean after the Africans made voyages to the court of the Song Dynasty?

7. How many fleets? What was Zhenghe’s sea route? What presents did the Ming court give Africa?

The Arabic contacts to the African coast .

He was taken prisoner by the Arabic army. He wrote his Record of My Travels.

It was a major development that the Africans were reaching out to China.

They set sail from the South China Sea …the Indian Ocean…the Red Sea…further south.

What is the main idea of the whole passage?

In your opinion, what makes people explore the

new place?

It talks about Chinese explorations, especially the contacts between China and Africa.

Trade and curiosity.

Put the sentences in good order.

1.In the eleventh century, the Africans made several voyages to the court of the song dynasty.

2.Merchants from the Arabic countries began to travel to the Swahili kingdom and the islands off the African coast to trade with them.

3.People of the Han Dynasty exchanged silk for spices and glass with Indians and Romans by way of the Silk Road.

4. The Chinese traveller, Du Huan, wandered

Through Arabic countries for about 10 years.

5.Christopher Columbus and other European explorers searched for routes to Asia.

6. Zheng He made seven voyages and discovered the eastern coast of Africa.

3 –2 – 4 – 1 – 6 - 5

reach out (to sb/sth )= reach for sth

=stretch out 伸手以拿到、抓到某物

Eg.He reached for his dictionary.

We must reach out to those in need.

我们应该伸出援助之手，帮助需要帮助的人。

reach vt. 到达，达到，获得

vi.

contact

n. 接触，联系 be in contact with…

eg. They have been in contact with each other for 5 years.

She came into contact with many people.

v. 联系，接触

When can I contact you tomorrow?

She contacted me upon her arrival.

make /lose contact with

2. …and other European explorers to search for sea

routes to the distant,…However, long before that

brave..(para1)

n. in search of

in a / the / one’s search for

v. search sb.for sth.

search (a place) for sb./sth.

search for sb./sth.

He immigrated to Brazil in search of a better life.

I have been searching for the same kind of shoes

as these.

①.Many policemen and soldiers are ___ the forest

___ the prisoner escaping from prison.

A.searching for; searching

B.searching; searching

C.searching; in search of

D.in search for; searching for

②.The policemen are searching ___every house ___the thief.

A.for; for B .of ; of C. /; for D. of ; for

C

C

3. long before

before long

1）There was a lively market long before.（很久以前）

2）Before long you will understand what I said is good for you.（不久=soon）

3）I had waited him long before he came.（在他回来之前我已等他很久）

It ___long before we ___the result of the

experiment.

will not be ; will know B. is ; will know

C. will not be;know D. is ; know

C

4)It won’t be long before you see him again.

5)It was long before they escaped from

the cruel prison.

不久你就会看到他了.

过了很久，他们才从监狱逃跑出来

3. ..Rome, in exchange for spices and glass.(para2)

exchange…with sb. 与某人交换

exchange…for 以…交换，与…兑换

in exchange for 交换，调换

Shall I exchange seats with you?

I’ve just bought this tie, but can I exchange it for that one?

Can I exchange pounds for dollars here?

I gave her a sweater in exchange for a skirt.

4. In return,the Ming court sent gold ,spices ,silk,

(p13 the second para. from the bottom)

in return adv.作为回报/报答地 (for+n.)

If you give me your photo, I’ll give you mine in

return.

He didn’t expect anything in return for his help.

He is giving her French lessons in

exchange for his English lessons.(物物交换)

set sail to/for/from

begin a voyage 起航

eg. He decided to set sail to/for New York the next day.

in return (for sth) 作为（对某物）的回报

as payment or reward (for sth)

eg. I bought him a drink in return for his help.

我请他喝酒以酬谢他的帮助。

so+ adj./adv. +that 从句

eg. He ran so quickly that we couldn’t keep up with him.

He is so tall a man that he can almost reach the ceiling.

so + v. + that 从句 如此，以致 于

v.通常是能够表示人的情绪的动词

eg. She so admired the pop star that she dreamt of him at night.

eg. I so hated him that I won’t see him any more!