One day, Bob took two of his friends into the mountains. They put up their tents(帐篷)and then rode off to a forest to see how the trees were growing.
In the afternoon when they were about ten kilometers from their camp(营地), it started to snow. More and more snow fell. Soon Bob could hardly see his hand before his face. He could not find the road! Bob knew there were two roads. One road went to the camp, and the other went to his house, But all was white now. Everything was the same. How could he take his friends back to the camp?
Bob had an idea. The horses! Let the horses take them back! But what would happen if the horses took the road to his house? That would be a trip(行程) of thirty-five kilometers in such cold weather!
It was getting late. They rode on and on. At last the horses stopped.
Where were they? None of them could tell. John looked around. What was that under the tree? It was one of their tents!
Bob and his two friends went to the forest          .

A．to find their way home	B．to build their camp
C．to see the trees	D．to see the mountains in the snow

They could hardly find their way back because          .

A．there was not any road in the mountains

B．everything was covered by snow

C．they couldn't decide which of the two roads went to their tents

D．there was only one road to their camp

It is clear that they wanted the horses to take them to         .

A．the forests

B．the mountains

C．the camp

D．John's house

The horses stopped because         .

A．they were tired after running for a long time

B．it was getting late

C．they saw the trees

D．they knew that they had got to the camp

The story happened          .

A．at night when nothing could be seen

B．in a cold camp

C．on a dark evening

D．on a cold winter day