Mike and Dick work in the same office. They don’t like the cold weather.Their plane arrived in Sydney at nine in the morning.They had a good rest in a hotel.  A few hours later the sun was shining in the sky and there was no shade (阴) from trees beside the road.They had to stop to look around. Mike found a river about half a kilometer away from them. They were both very happy and drove the car quickly. Before they jumped into the water，Dick saw a boy playing under a big tree. He asked,“Are there any sharks（鲨鱼） in the river，please?”
“No，there aren’t” answered the boy.
So they began to swim in the river.He told Mike about it.They were afraid and decided to stop swimming. Dick asked loudly，“Is it true that there aren’t any sharks in the river?”
“Yes，sir，”said the boy. “But there’re a lot of crocodiles（鳄鱼）in the water.”
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