Joe and David were both mountaineers. As Joe was well experienced, he was always asking David to learn from him. "Want to stand on top of the world, David?" "Of course. It has already been my dream!" David answered.

On a sunny morning, the two men started for the top of a famous mountain. After they climbed over one of the most dangerous slopes (斜坡), they found a man lying in the snow. "He's going to die," David looked at Joe and said, as if he would help the man. "Leave him alone and just follow me! But if you bring the burden with you, I'm afraid that you'll lose your own life." Joe warned David. Then he turned around and walked forward alone. It was too cold, after thinking for a while, David made up his mind to help the man. He carried the man on his back and went to make his way. Little by little, David's temperature made the man warm. The man came to himself! And soon he could move all by himself. Together they moved side by side.

About two hours later, they caught up with Joe. To their surprise, they found that Joe was lying in the snow, too. He had been frozen to death!

1. David was _________ than Joe in climbing mountains.

A. less experienced    B. cleverer               C. less confident        D. far stronger

2. The underlined word "burden" here in Chinese means _________.

A．病人                         B．累贅                    C．伙伴                   D．絆腳石

3. The man was going to die because _________.

A. he was badly hurt                                      B. he was too tired

C. it was terribly cold there                           D. he fell down from the top

4. Which is WRONG according to the passage?

A. David used to listen to Joe.

B. Joe thought David would lose his life if he saved the man.

C. David saved the man's life because they were good friends.

D. Among the three man, only Joe died on the mountain.

5. The best title of this passage may be _________.

A. On the top of a famous mountain!          B. Help Others, Help Yourselves!

C. Wear Correct Clothes in the Snow!               D. Be Good Friends!