19. What made the woman begin to feel strange about the old woman?

A. That she was unable to speak. B. That she kept nodding her head.

C. That she gave no answer to her questions. D. That she had large and hairy hands.

20. A "lift" in the passage means ______.

A. an act of raising something B. a ride in the car

C. trouble D. an elevator

21. From the story we can see that the young woman was ______.

A. kind and clever B. beautiful and bright

C. foolish and shy D. strong and helpful

22. What do you think "the old woman" was? ______.

A. A criminal B. A beggar.

C. A poor villager. D. A policeman.

　　　　　　　　　　　　　　　C

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（爱斯基摩人）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 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 directly overhead, it's noon.

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

Seaman on a ship learned 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.