評(píng)論
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Dialogue Language Structure:
The Present Continuous Tense in the Passive Voice
A:This brides is getting more and more crowded.
B:Yes.Look!So many cares are being held up.
A:As a matter of fact,the traffic is getting wrorse and worse.
B:Don't be too wrrried about it.
A:Why not?
B:Anotehr bridge is being built.
Listening Comprehension
Listen and fill in the blanks.
There(1)___many big,long bridges in the world.
One of the most famous brides(2)___the Golden Gate Bridge in San Francesco.
It(3)___in 1937.
The floor of the bridge(4)___wide enough for six lanes of cars,thre in each direction.
It(5)___a long time to go on foot from one end of the bridge to the other.
Since 1950 many other big bridges have been built in the United States.
Now the science of bridge building(6)___.
New building materials and new constrction techniques(7)___.
We know new designs(8)___in the future.
In fact,a number of big bridges()___in Britain.
Italy,Japan and China as well as in the United States.
Text Plastics for Everyone
A person can live in the modern world without synthetic substances.
But if anyone tries to do it,
he will soon miss many common things.
Besides plastic pens,combs,and toothbrushes
he will be without many kinds of cloth
as well as some necessary parts of radios and television sets.
Items like briefcases and suitcases
are more expensiveif they are made of leather instead of plastic.
Today there are many different types of plastics,
and the manufacture of them is a very important industry.
The finished products may be almost any colour, shape or texture.
They may be hard or soft,
and they can be made resistant to fire water and electricity.
If a person visits the world's market places,
he will find that plastics are being made and used almost everywhere.
Plastic articles can be produced at a rather low cost.
The machines for moulding them are not large or heavy.
Most of the products are also lightweight
and can be stored and transported easily.
Thus, plastics are both popular and practical,
and factories for making them can be found in many countries.
New Words and Expressions
