Mike and Dick work in the same office. They don't like the cold weather. And 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(租借) a car in the city and began their travel.
A few hours later the sun was shining in the sky and there were no shade trees(树荫) 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 and it 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 water, Dick saw a boy playing under a big tree. He asked, "Are there any sharks in the river, boy?" "No, there aren't." answered the boy. So they began to swim in the river. After a while, Dick felt something hit against(碰撞) his leg. He told Mike about it. They were afraid and stopped swimming. Dick asked loudly, "Is it true that there aren't any sharks in the river?"
"Yes, sir," said the boy, "There're a lot of crocodiles(鳄鱼) in the water.
All the sharks(鲨鱼) have swum away!"  
⑴Mike and Dick went to Australia ______.
A.by plane
B.by car
C.by train
D.by motorbike
⑵The two young men went to Australia to ______.
A.swim in the river
B.study to drive
C.make a travel
D.find some work
⑶ Mike and Dick couldn't drive any longer because ______.
A.the sun was shining in the sky
B.the weather was very hot
C.there were no shade trees beside the road
D.they were too tired
⑷Dick became afraid because ______.
A.he saw a shark in the water
B.he thought that maybe a shark had hit against his leg
C.he saw the boy laughing at(嘲笑) them under the big tree
D.the boy had told them that there were some sharks in the river
⑸When they heard the boy's words, the two young men began to ______.
A.catch the crocodiles in the water
B.look for the crocodiles there
C.run to beat the Australia boy
D.come out of the river at once