The Slowest and the Fastest

　　The state of Florida was once almost gobbled (大吃) up by snails(蝸牛). They were giant(巨大的) snails from Africa. A visitor took some to Florida, where they spread quickly. Some of the snails were as big as a person's hand. They ate the leaves on trees and other plants. They had to be stopped, and they were. Poison killed thousands of the snails, and Florida was saved.

　　Catching a snail should be easier than catching any other animal. The snail is the slowest of all land animals. Its top speed is 55 yards per hour. At this speed it would take the snail about 32 hours to travel one mile. A snail only goes that fast when it's very hungry.

　　The bar graph below shows some other top speeds.

　　A bar graph has bars of different lengths, instead of pictures. This kind of graph makes it easy to compare several things quickly. To read the graph, notice where each bar ends. Then find the closest number at the bottom of the graph.

　　Use the bar graph about running speeds to answer the questions.

1．What is the top speed of a rabbit?

[　　]

A．30 miles per hour
B．35 miles per hour
C．40 miles per hour
D．50 miles per hour

2．Fifty miles per hour is the top speed for ________ .

[　　]

A．a(chǎn) rabbit
B．a(chǎn) human
C．a(chǎn) greyhound
D．a(chǎn) gazelle

3．What is the difference in running speed between a greyhound and a gazelle?

[　　]

A．5 miles per hour
B．10 miles per hour
C．15 miles per hour
D．20 miles per hour

4．The closest to an elephant in running speed is ________ .

[　　]

A．a(chǎn) human
B．a(chǎn) greyhound
C．a(chǎn) chicken
D．a(chǎn) rabbit

5．A rabbit and greyhound can both run faster than ________ .

[　　]

A．50 miles per hour
B．45 miles per hour
C．40 miles per hour
D．30 miles per hour
答案：B;D;B;A;D
提示：

gazelle [g+>zel] 羚


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    Hi Grace,

    How's it going? Sorry I haven't emailed for a while, but I had so much to do!

    I had told you about my decision to take up a sport. I knew I wasn't fit and I wanted

to get some exercise. But that wasn't the only reason that I decided to do a sport. Students

who play sports do better at school.1.                  Exercise also helps learning

and memory (記憶).

2.                  First, I tried soccer. I had played a bit of soccer before

and I thought it wouldn't be too bad. I knew I couldn't nm for very long without feeling

tired. On the first day, I was able to nm for the first ten minutes, but then I was so tired

that I couldn't even kick the ball!

    Then, I tried volleyball. 3.                 I was able to nm for the first twenty

minutes and I wasn't the slowest runner in the team! After a few weeks .I could run faster

and longer. I was doing better and feeling better. 4.              Maybe I'm

not a team sport person after all!

    Finally, I tried kung fu. It's a great sport that exercises the body and the mind. You learn to follow instructions carefully and do what you are asked to do. This is the fight sport for me! 5.                   I feel so confident that l even showed some moves to the class last week! Can you believe it?

     I hope you're OK!  Write and let me know what you've been doing!

      Bye for now!

Kristie

 

    

 

 

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Harry’s father bought a magazine which gave its readers information about all kinds of products and helped them make the best choice while buying．

Harry borrowed his father’s magazine when he needed a new computer．“I’ll read it and choose the best one．” He said．

The magazine described these computers．

The DGT PC450

The BNK 975XF: AT $3，200

The CGP 8PT

This computer comes with lots of good software. However it does not have much memory and is rather slow．At $2，850 it’s not very good value for money.

This is the most expensive computer we tested．However it is also far the most reliable (可靠的)．It is very fast and has lots of memory．It is worth the extra money if you can afford it．

At only $1，900．It has lots of money and is quite fast．However it broke down twice while we were testing it and we cannot recommend (建議) it for reliability．

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1.Harry wants to buy a computer，so he borrowed ________ from his father．

A．a(chǎn) computer magazine              B．a(chǎn) magazine about all kinds of products

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