求解释我的英语@@!1Mike and Dick work in the same office.They don't

求解释我的英语@@!1
Mike and Dick work in the same office.They don't like the cold weather.One day they 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(租) 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 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 went 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 in the river "
"No," answered the boy,"there aren't any."
So they begin to swim in the river.After a while,Dick felt something hit against his leg.He told Mike about it.They were very afraid and stopped swimming.Dick asked the boy loudly,"Is it sure that there are not any sharks in the river " "Yes,sir.There are a lot of crocodiles in the water.The sharks have all swum away."
When die they arrive in Sydney?
What was the weather like the next day?
What did they do in the river
A shark hit Dick's leg,didn't it?
Why weren't there any sharks in the river