Question

Did you ever notice your shadow at different times of the day? Shadows change as the day goes on.

In the morning the sun makes long shadows. In the middle of the day, the sun seems to be right over your head and your shadow is very, very small. As the sun goes down in the afternoon, shadows grow very long again. But the long afternoon shadows fall in a different direction from the long morning shadows.

Long, long ago people told time by the shadows. Put a piece of paper in the sunlight. Stand a pencil in a spool in the middle of the paper. The shadow of the pencil will fall on the paper and move as the day goes on. Use a watch and every hour marks the place where the shadow falls. Now your paper is a sundial（通过太阳辨别时间的日规）and you can tell every sunny day. Just look at your paper sundial and see where the shadow falls.

1.When do shadows change?

A. Shadows change in the evening.    B. Shadows change when it is raining.

C. Shadows change as the day goes on.    D. Shadows change when it is snowing.

2.What happens to one’s shadow as the sun goes down in the afternoon?

A. He can’t see his shadow.    B. His shadow becomes long again.

C. His shadow becomes short.    D. His shadow becomes ugly.

3.What does one need to make a sundial?

A. A pencil, a watch and a spool.

B. A watch, a piece of paper and a pencil.

C. A spool, a piece of paper and a watch.

D. A piece of paper, a pencil and a spool.

Answer

1.C

2.B

3.D

【解析】

试题这是一篇说明文。主要讲述影子随着时间的推移而改变，很久以前人们是通过观察影子的变化来识别时间的。

1.细节理解题。由第一段的“Shadows change as the day goes on.”可知，影子随着时间的推移而改变。故选C。

2.细节理解题。由第二段的“As the sun goes down in the afternoon, shadows grow very long again.”可知，当太阳在下午落下时，影子又变长了。故选B。

3.细节理解题。由最后一段的“Put a piece of paper in the sunlight. Stand a pencil in a spool in the middle of the paper. The shadow of the pencil will fall on the paper and move as the day goes on.”可知，制作日规需要一张纸，一支铅笔和一个线轴。故选D。