Snow fell on the mountain. It snowed and snowed. The snow did not melt(融化). It became deep and heavy. The snow on the bottom pressed together., it became ice.

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

Sometimes the glacier moved only a few inches(英寸) each day. As it moved, it took rocks and dirt with it. It changed the land. In some places, it left hills. In some places, when the glacier melted, it made 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 down the side of a mountain. This glacier will change the land, too.

1.The snow that fell on the mountain _______ before glaciers were formed.

A. became river B. melted C. became ice D. turned to 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 warm places.

D. The earth is getting warmer and this leads to the melting of glaciers.

3.The main idea of the whole story is that __________.

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

C. glaciers changed the land D. snow became ice to form a glacier

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