摘要: Use the Simple Future Tense to describe the thing that will happen.

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The Tin Lizzie

  It shook, rattled (嗄嗄作响), and groaned (呻吟). It wasn't pretty. It looked like a black box sitting on high, skinny wheels. But it could go anywhere, and it was cheap.

  What was it? It was Henry Ford's Model-T ca-better known as the Tin Lizzie. This car was the most popular of all for nearly 20 years. It changed the American way of life forever.

  Model T's were sold as fast as they were made. Eleven thousand were sold in 1908. They cost $850 each. Of course, you can't buy a new car for $850 any longer. The prices of new cars keep changing.

  The line graph below shows how the average prices of American cars have been changing.

  A line graph shows how something has changed. This kind of graph uses a simple line to show changes. If the line goes up, that means things have gone up in some way. If the line goes down, then something has gone down.

  Suppose you want to find the average price of cars for 1977. Find 1977 at the bottom of the graph. Find the dot over the year. Then find the price across from the dot.

  Use the line graph to answer the questions below.

1.What was the average price of a car in 1979?

[  ]

A.$4000.
B.$6000.
C.$8000.
D.$10000.

2.What does the line graph show about car prices?

[  ]

A.They have been going up.
B.They have been going down.
C.They have not changed.
D.They have been cut in half.

3.In what year did cars cost more than $4000 but less than $6000?

[  ]

A.1975.
B.1977.
C.1979.
D.1981.

4.Suppose you were looking for a new car in 1981. What would the average price have been?

[  ]

A.Less than $6000.
B.Less than $8000.
C.More than $8000.
D.More than $10000.

5.How did the average price of cars change from 1977 to 1979?

[  ]

A.It went up by $1000.
B.It went up by $2000.
C.It went down by $1000.
D.It went down by $2000.
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The Slowest and the Fastest

  The state of Florida was once almost gobbled (大吃) up by snails(蜗牛). 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 rabbit
B.a human
C.a greyhound
D.a 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 human
B.a greyhound
C.a chicken
D.a 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
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