One day a policeman was taking a thief to the city．On the way they saw a shop．The thief said，“Let me go into the shop to buy some bread, We can eat it in the train．”

The policeman agreed．The thief went into the shop and ran out of the back door．When the policeman knew that，he began to look for the thief everywhere．At last the policeman caught the thief again．They went on to the city．On the way they came to the same shop．The thief wanted to buy some bread again．“Oh，no，”said the policeman．“You did that before，and you ran away．This time I’ll　 go into the shop and buy bread．You must wait here for me．”

( )46.What was the policeman doing one day?

　 A.catching a thief with others．B.doing nothing．

　 C.taking a thief to the city．　 D.walking to the city by himself．

( )47.On the way the thief asked to ________．

　 A.buy some food to eat　　　　　　　 B.let him free

　 C.take a rest　　　　　　　　　　　 D.walk slowly

( )48.When the thief went into the shop，he ran out of ______．

　 A.the back door　　　　　　　　　 B.the back window

　 C.the front door　　 　　　　　　 D.the front window

( )49.Which of the following is right?

　 A.At last the policeman caught the thief again、

　 B.The policeman looked for the thief,but he didn’t find him．

　 C.The thief was caught again by other policemen．

　 D.The policeman went back with the thief

( )50.From the last three sentences we know that the policeman was very _________．

　　 A.brave(勇敢的) B.careful C.clever D.foolish(愚蠢)