One day, Mike and Dick decided to take their holiday in Australia. Their plane arrived in Sydney at nine in the morning. They had a good rest in a hotel. The next morning they rented a car in the city and began their trip. A few hours later the sun was shining in the sky and there were no shade trees beside the road. It was so hot that they could hardly(几乎不) go on driving. They had to stop to look around. Mike found a river was about half a kilometer away from them. They were both very happy and drove the car quickly. Soon they got to the river. Before they jumped into the river, Dick saw a boy playing under a big tree. He asked the boy, "Are there any sharks(鲨鱼) in the river? " "No," answered the boy, "There aren't any. "
So they began to swim in the river. After a while, Dick felt something hit(敲打) against his leg. He told Mike about it. They were very afraid and stopped swimming. Dick asked the boy loudly, "Is it true that there are not any sharks in the river? " "Yes, Sir. There are a lot of crocodiles(鳄鱼)in the water. The sharks all swam away. "
