题目内容：

Snow falls on the mountain. It snows and snows. The snow doesn't melt(融化)．It becomes deep and heavy. The snow on the bottom pressed together becomes ice.

The ice is very wide and thick. It begins to move down the mountain. It is like a river of ice. It is a glacier(冰河)．

Sometimes the glacier moves only a few inches(英寸)each day. As it moves，it takes rocks and dirt with it. It changes the land. In some places，it leaves hills. In some places，when the glacier melts，it makes rivers and lakes.

A million years ago，there were many big glaciers .Glaciers covered many parts of the world. The glaciers changed the land.

Glaciers are still at work today. A glacier in the north of Canada is cutting a new path(道路)down the side of a mountain. This glacier will change the land，too.

1.The snow that fell on the mountain ________．

A. became snowmen    B. melted    C. became ice    D. turned into rain

2.Which of the following does this story lead you to believe?

A. There are not as many glaciers as there used to be.

B. Glaciers do not change the land as they move over it.

C. Glaciers are found only in the north of Canada.

D. There is only ice in glaciers.

3.How fast does the glacier move?

A. Sometimes the glacier moves only once a year.

B. Sometimes the glacier moves one inch each day.

C. Sometimes the glacier moves only a few inches each day.

D. Sometimes the glacier moves a few times each day.

4.The main idea of the whole story is that ________．

A. snow is heavy    B. the high land never changes

C. glaciers change the land    D. glaciers are made of rivers