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A mobile phone is in fact a small radio. A radio sends a person’s voice over a long way to another radio. A voice that is sent by radio is called a signal. A radio signal travels very quickly.
Only a few years ago, mobile phones were very large. They needed large batteries.
They had to be powerful to send their signal to far away places. This was because most cities had only one antenna tower for mobile phones.
Do you know what use a mobile phone has? Yes, you can use it to do a lot of things.
Call
your friends and family from almost anywhere.
Call the police immediately if there is an accident in the street.
Send or receive an e-mail.
Get information from the Internet.
Send and receive messages：Sending short messages is a popular way to use your mobile phone. Many people use short forms of words, so the messages are quick to write and read. Can you guess what these messages mean? Try reading them out. What do you hear?
RUOK CUL8R That’s EZ Will I C U B4 2moro? That’s Gr8!
91. There are about _____ ways of using a mobile phone.
A. five B. six C. seven D. eight
92. Today’s mobile phones are _____ according to the writer.
A. cheap and popular B. small but powerful C. big enough D. easy to use
93. A mobile phone uses _____ to send people’s voice and short messages.
A. radio signals B. batteries C. computers D. antenna towers
94. Which short message means “See you tomorrow!”?
A. RUOK B. CUL8R C. That’s Gr8! D. CU 2moro
95. What’s the main idea of the passage?
A. The common knowledge of the mobile phone
B. How the mobile phone will develop
C. How the mobile phone works and what use it has
D. What short forms of words mean in written messages
查看习题详情和答案>>A. enough to big B. big to enough C. big enough D. enough big
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We must find a room big enough________ .
[ ]
A．for all of us to live
B．for all of us to live in
C．for all of us to live on
D．for all of us to live in it
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The people of Mexico also built pyramids
（金字塔）. They didn't build them for tombs（墓）. They built a pyramid and then built a temple（庙）on top of it. The pyramids of Mexico are not as high as the pyramids of Egypt, but they are big enough.The biggest pyramid in Mexico is almost 2,000 years old. Scientists think it took 10,000 men more than ten years to build it. How were the people of Mexico able to build the pyramids thousands of years ago? How did they carry and lift the huge stones? Each stone fits so well and they didn't have our modern machines! Nobody can tell how they were built.
Choose the best answer
：
(1) The pyramids in Mexico were built by ________.
[
]|
A ．the people of Mexico |
B ．the people of Egypt |
|
C ．the scientists |
D ．American people |
(2) The pyramids of Mexico are ________ the pyramids of Egypt.
[
]|
A ．higher than |
B ．as high as |
|
C ．lower than |
D ．as low as |
(3) It took ________ years to build the biggest pyramid in Mexico.
[
]|
A ．more than ten |
B ．ten |
|
C ．more than 2,000 |
D ．almost 2,000 |
(4) ________ how the people of Mexico built their pyramids.
[
]|
A ．Everybody knows |
B ．Some scientists can tell |
|
C ．Many of us can tell |
D ．Nobody knows |
(5) The biggest pyramid of Mexico has a history of ________.
[
]|
A ．one thousand years |
B ．about two thousand years |
|
C ．more than two thousand years |
D ．fifteen hundred years |