---What's he size of the smaller one?

---It's _______.

---What's he size of the smaller one?
---It's _______.

It’s amazing that Mike should get such good marks while he does only _____ the others.

A．as much as half         B．half as much as      C．as many as half      D．half as many as

阅读理解

　　We now know that the sounds of every city are loud enough to cause great damage to the citizens' hearing—in the United State, one person out of twenty has got some hearing loss. And all over the world the situation is getting worse all the time since increases with the population.

　　It has also increased greatly in the 20th century with the development of machines. We live surrounded(包围)by loud planes, trucks, motors, buses, electric tools and radios—that add up to 90 or 100 decibels. The decibel is the unit used to measure the loudness of sound. A normal dialogue reaches 55 decibels; a plane goes to 100 decibels and more, and an ordinary train reaching the station can be twice as loud as the loudest plane. The disco music reaches around 118 decibels. At 120 decibels the ear stops hearing sound, and pain starts. How terrible that may be!

1．According to the passage we know the world situation has turned from bad to worse as a result of ________．

[　　]

A．the development of modern machines

B．some people's heating loss

C．the low decibels made by the noise

D．the increasing population

2．The noise made by a flying plane is ________ that by train arriving at the station.

[　　]

3．If we want to measure the sound of a loud-speaker, we should use the unit of ________.

[　　]

A．meters

B．pounds

C．decibels

D．dollars

4．This passage mainly tells us that ________.

[　　]

A．people's hearing is getting worse

B．how pain begins in the ear

C．how we can stop the noise

D．noise is dangerous to people's heating

5．After you read the passage, you would probably prefer ________.

[　　]

A．to enjoy light music only

B．to turn down the speakers while enjoying music

C．to sell your louder-speakers