How could we tell time if there were no watches or clocks anywhere in the world? The sun was probably the world’s first “clock”, except in the far north, where the Eskimos live. There, it’s dark most of the winter, and light most of the summer. But in most of the world, people have used the sun for a clock. Even today, if you don’t have a clock, you still know that when the sun shines, it’s day, and when it’s dark, it’s night. The sun can also tell you if it’s morning, noon, or afternoon.

People who live near the sea can tell time from the tides. In the daytime, for about six hours, the water rises higher and higher on the beach. And then it goes down and down for about six hours. The same thing happens again at night. There are two high tides and two low tides every 24 hours.

Seamen on a ship learn how to tell time by looking at the moon and the stars. The whole sky is their clock.

In some places in the world the wind comes up at about the same time every day or changes direction or stops blowing. In these places the wind can be the clock.

A sand clock is an even better clock. If you had fine dry sand in a glass shaped like the one in the picture, you would have what is called an hourglass. The sand in the hourglass goes from the top part to the bottom part in exactly one hour. When the hourglass is turned over, the sand will take another hour to go back again.

1.According to(根据)the passage, there are _______ ways to tell time besides the clock and watch.

A. 3 B. 4 C. 5 D. 7

2.The Eskimos in the far north can’t use the sun for a clock because __________.

A. they know very little about the sun

B. the sun there never goes down in winter

C. it’s too cold for them to go out to watch the sun

D. it has long dark winters and long light summers

3.The underlined(下划线)word “tides” in the passage means __________.

A. 洋流 B. 潮汐 C. 海啸 D. 波浪

4.What’s the best title for the passage?

A. Different Ways to Tell Time B. Useful Machines to Tell Time

C. The History of the Clock D. The Development of the Clock

A Play: Four Butterflies(蝴蝶)

Characters: Red Butterfly(RB),Green Butterfly(GB),Green Tree(GT),Rose(R), Grandpa Sun(GS)

Look!There are four butterflies in the garden. One is red,one is yellow,one is green,and the last one is white. They play games and dance together every day,and they are very happy. One day,it's fine. Four butterflies are playing a game in the garden. Suddenly it is full of dark clouds and it begins to rain hard.

1.GB: Oh,it's raining hard.Green Tree is over there. She can help us… Green Tree,our wings are wet. Please let us stay under your leaves.

GT: Green Butterfly,I like you. We have the same colour. You can come in,but the other three butterflies must go away.

GB: No,thank you. We are good friends. We love each other and must stay together.

RB: Rose is over there. She can help us.

2.RB: Rose,our wings are wet. Please let us stay under your leaves.

R:Red Butterfly,I like you. We have the same colour. You can come in,but the other three butterflies must go away.

RB: No,thank you. We are good friends. We love each other and must stay together.

3.GS: What good friends they are!This is a real friendship. I must help them.

The sun drives the clouds away and asks the rain to stop. Soon the sun gives off bright light and dries up their wings.

4Four butterflies: Oh,the sun comes out. Our wings are dry. Let's play and dance again.

1.What are the butterflies doing when it starts to rain?

A.They are flying. B.They are dancing.

C.They are playing a game. D.They are staying under the leaves.

2.Whom do the butterflies ask for help?

A.Green Tree. B.Rose.

C.Green Tree and Rose. D.Green Tree,Rose and Grandpa Sun.

3.Who helps the butterflies at last?

A.Rose. B.Grandpa Sun. C.Rain. D.Dark clouds.

4.What is the main idea of the play?

A.Butterflies cannot fly if their wings are wet.

B.The four butterflies are sisters and brothers.

C.Grandpa Sun often helps others.

D.A real friendship means that friends stay together when they are in trouble.

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