题目内容：

One day Bob took two of his friends into the mountains. They put up their tents 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, it started to snow. More and more snow fell. Soon Bob could hardly see his hands 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 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. Bob looked around. What was that under the tree? It was one of their tents!

根据短文内容，选择正确答案。

1. Bob and his two friends went to the forest to _________.

A. build their camp

B. find their way home

C. enjoy the mountains in the snow.

D. watch the trees in the forest

2. They could not find their way back because ___________.

A. there was only one road to their camp. 

B. there was no roads in the mountains at all.

C. they couldn’t decide which of the two roads led to their tents.

D. everything was covered by the white snow.

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

A. Bob’s home   B. the camp   C. the forest   D. the mountains

4. The horses stopped because ___________.

A. it was getting late.  

B. they had seen Bob’s house

C.they knew that they had got to the camp

D. they were tired after running for a long time

5.The story happened _________.

A. on a cold winter day 

B. on a dark snowy evening

C. in a cold camp far from villages

D. at night when nothing could be seen