A doctor, a lawyer（律师）, a little boy and an old man were out for a Sunday afternoon flight on a small plane. Suddenly, the plane had engine（发动机） trouble. At last, the pilot took a parachute（降落伞） and shouted to the four people that they had better jump, and then he himself jumped out. Unluckily, there were only three parachutes left.

The doctor took one and said, "I'm a doctor. I save lives, so I must live." Then he jumped out. The lawyer then said, "I'm a lawyer, and lawyers are smart people in the world. I must live." He also took a parachute and jumped out.

The old man looked at the little boy and said, "My boy, I live a long and full life. You are still young. Take the last parachute and live in peace." The little boy handed the parachute back to the old man and said, "Don't worry, grandpa. The smart man in the world just jumped out with my schoolbag."

Sara got up early this morning. Today she and her family were going on a hike （远足）. It was Sara's first hike. 

They drove for two hours. Then Sara's mother stopped the car at the foot of the mountain. Sara, her parents and her brother began to walk. There were a lot of tall trees and flowers. Butterflies and bees（蜜蜂） flew around. Sara felt afraid of the bees at first, but soon she didn't because she found the bees were more interested in the flowers. 

After walking for an hour, Sara was tired. "Come on, Sara," said her brother. "You can do it! You're ten years old. That's old enough to hike. " Sara kept going and looking around. There was green grass everywhere. She saw a small rabbit in the grass. Sara shouted in surprise and the rabbit ran away quickly. 

Another hour passed. They got to the top of the mountain. Sara's mother began to take out their picnic （野餐）. There were hamburgers, eggs, beef and juice. "Congratulations, Sara!" said her father. "You have just finished your first hike!" Sara smiled. She thought she liked hiking. 

Our family went to the Yellow Stone National Park last summer vacation. Our son, Tom, wanted to see bears there. And what a breathtaking experience (经历) it was!

When we got there, we put up our tent and went to explore (探险). As we returned, we heard our daughter Susie cry out. And then we saw a bear go into our tent.

Tom wanted his father to chase (追赶) it away. His father said, "No. It's dangerous to chase a bear. And don't let it chase you." Susie said, "What shall we do? Maybe we should climb up a tree." Tom said, "No. We have to get it out of there. It might (可能) go to sleep in our tent." "Maybe we could make it leave if we put some honey outside for it to eat, " Susie suggested (建议). Then I said, "How are you going to get the honey? It's in the tent." We watched the bear go into the tent and heard it upset (翻倒；弄翻) everything inside. "It's foolish (愚蠢的) of us to try to chase it away, " said my husband (丈夫)."Leave it alone and wait for it to come out." We waited, but the bear stayed inside. We had to sleep in the car that night.