A man and his wife had a dog.When they went out,they always left the dog inside the house.One evening they wanted to go to the cinema,so they left the dog in the house and locked the door and locked their garden gate.They went off in their car.
When the film was finished,they came home again.They opened the gate and put the car away.But when they came to the front door,they found that part of the glass in the door was broken.The door was not locked and it was open.A robber!They went in and quickly looked in all the rooms to see if the robber had taken their things.But everything was in the right place and nothing at all was missing.
The dog was sleeping in the sitting-room.The wife was angry with the dog.‘Why didn’t you guard the house?’ she said.The dog was pleased to see its owners.It began to wag（搖）its tail and then it went to a corner of the room and picked up something in its mouth.It went to the wife and dropped the thing at her feet.When she went to pick it up,she was very surprised.Can you guess what the dog’s present was —It was … a … man’s finger!
The end of the story is this.This dog’s owner telephoned the police and told them everything.Three days later the police caught the robber.They found him easily.
（ ）50.That evening the man and his wife .
A.went to see a film with their dog
B.left the dog alone at home
C.went home before the film was finished
D.locked the door and could not open it
（ ）51.The robber stole（偷） .
A.everything from the house B.some expensive clothes from the house
C.nothing from the house D.a car from the house
（ ）52.Why was the woman angry with the dog?
A.Because she thought it had made the room dirty B.Because she thought it had broken the glass.
C.Because she saw it wag its tail.
D.Because she thought it hadn’t guarded the house.
（ ）53.The robber was caught easily because .
A.the police knew him B.the police happened to meet him
C.the dog’s owner knew where he lived D.he lost one of his fingers
（ ）54.The man and his wife would .
A.like their dog more than before B.drive the dog away from their home
C.let the dog bring home more presents D.ask the police to take away the dog