北师大初中英语九年级（全一册）--Unit 4-15

[00:01.03]Unit 4 Inventions and Inventors

[00:04.72]Lesson 15

[00:09.97]Exercise 1.2

[00:13.66]In many big cities in the world ,

[00:16.39]the over use of cars is thought to be

[00:19.18]one of the major causes of air pollution,

[00:22.03]What will cars be like in the future?

[00:25.38]Some experts 2 think that today's cars are

[00:27.45]in trouble because they use too much gas,

[00:31.63]They say the car of the future will be much，

[00:34.15]much smaller.

[00:36.15]The car of tomorrow will be made without a

[00:38.43]motor or air conditioning 4.

[00:40.77]It'll have no radio and no lights,

[00:43.90]Tomorrow's car will be an open air car

[00:46.17]with no doors and windows,

[00:48.67]It won't need a pollution control system

[00:51.29]because it won't use gas .

[00:53.71]In fact,this new car will be pushed

[00:56.34]by the driver's feet,

[00:58.50]Very few people will be killed in accidents,

[01:01.69]because the top speed will be

[01:03.42]five miles per 3 hour.

[01:05.66]However,we are also warned 5 not to

[01:08.14]ask for pretty colors,

[01:10.31]because the cars will come in gray only.

[01:13.92]Other car experts do not hold the same idea.

[01:17.67]They are sure that the future will be happy.

[01:20.62]They think that all our problems will

[01:22.38]soon be solved by car companies

[01:24.53]with the production 6 of the Supercar.

[01:27.48]Tomorrow's car will be bigger,faster,

[01:29.73]and more comfortable than before.

[01:32.08]The Supercar will have four rooms ,

[01:34.61]color Tv,running water,heat,air conditioning.

[01:38.98]and maybe a swimming pool.

[01:41.05]Large families will travel

[01:42.56]on long trips comfortably.

[01:44.90]If gas is in short supply 7,

[01:47.51]the Supercar will run on water.

[01:55.69]Exercise 2.1

[01:59.46]Ask the Expert 1:

[02:01.42]The page where we try to answer

[02:03.28]all your problems,large and small.

[02:07.07]My question is about food,

[02:09.66]especially about fruit.

[02:11.50]Is it possible to freeze 8 strawberries?

[02:15.48]Many fruit can be frozen 9 very easily.

[02:19.49]As a rule,

[02:20.67]soft fruits like strawberries,etc.

[02:23.78]are difficult to freeze.

[02:26.65]I have just bought a shirt in a street market.

[02:30.11]The shirt is white

[02:31.54]and it has some dark blue letters,

[02:34.03]How should I wash it?

[02:36.20]You should be careful the first time

[02:38.50]you wash your shirt

[02:40.43]because the blue color might come out

[02:42.63]and mark the white part.

[02:44.89]A shirt like this should be washed

[02:46.98]in cold water,by hand.

[02:50.56]I have a new computer.Is it okay

[02:53.75]if I put it on the desk under the window?

[02:57.27]It depends.

[02:59.44]Does the window receive a lot of sunlight 10?

[03:02.40]Electrical machine shouldn't be put under

[03:05.27]sunlight because the heat can cause problems.

[03:06.10]