How could we tell time if there were no watches or clocks any where 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 fully, if you don’t have a clock that shows time, you still know that when the sun shines, it’s day, and when it’s dark, it’s night. The sun can not only tell you whether it’s day or night but also it’s morning, noon, or afternoon. When the sun is almost over your head, it’s noon.

People who live near the sea can tell time from the tides(潮水). 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 twenty-four hours.

Seaman on a ship tells 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. From the passage we can know there are ____ ways to tell time besides the clock and watch.

A. three B. four C. five D. seven

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.This passage is probably a kind of ___________.

A. news B. science

C. advertisement D. sports

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

A. Different ways to tell time.

B. How the clock was invented.

C. The development of the clock.

D. A useful machine to tell time.

阅读与回答问题。

Camping in your backyard is full of fun, whatever your age. It's great for keeping us relaxed. It offers chances to check the night sky and to be noisier than usual. It lets us have friends over to stay who might not fit inside the house! Follow these instructions and you'll have a night you’ll never forget!

Put up your tent.

Depending on the number of family members and guests, you may need more than one tent. Tell your friends to bring their tents if needed. Follow the instructions or check out the articles on how to put up a tent on the Internet.

Prepare your bedding.

You'll want your guests to be able to relax in comfort. Put something soft to lie on on the floor: A blow-up air mattress or thick comforters may work well. Fill the tent with soft toys and blankets (毯子). Have lightweight sleeping bags or cotton blankets. They are especially important because the night temperatures may drop greatly.

Prepare a seating area.

If you have a picnic table, that would work best. If not, set up a few chairs and a small table to set out drinks and food. A simple choice is to lay out a blanket in the sun, so that your friends can eat and talk. Be sure the grass isn’t wet!

Make memories.

Plan some activities. You're camping in the backyard, so it's time to make the most of being outdoors.

Have a camera nearby to take silly photos of you, your family members, and your friends. Take one large group shot with everyone smiling and laughing. Be sure to make copies for everyone!

1.Is camping in the backyard great fun?

_________________________________________________________________

2.Why are the lightweight sleeping bags or cotton blanket important?

_________________________________________________________________

3.What is a simple choice to prepare a seating area?

_________________________________________________________________

4.How many instructions are mentioned in the passage?

_________________________________________________________________

5.How do we make memories?

_________________________________________________________________

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