13.5÷______=()()=0.45=18：______=______%

        Walking in the street, Richard didn't know where to go. His hometown was about 400 miles away.
He used to have little food. So he came to this city. But nobody would use a man who could neither read
nor write. It began to snow and soon the ground turned white. He felt a little warm when he was passing
a restaurant. He stood at the gate, but a policeman saw him and made him leave.
       The young man was hungry and cold . He was afraid of dying in such bad weather.He went in a
supermarket. It was quite warm in it. He knew he would soon be driven out. He thought for a while and
had an idea. He looked around. The salesgirl was busy serving (为…服务) a rich man. He put on a coat
quickly and hurried off. Bad luck! Another salesgirl found it. Of course, he was caught and sent to a police
station. He understood the prison (监狱) was waiting for him.
      "Were you thinking of anything while you were stealing the coat, young man?" asked an officer.
       "Yes, sir" answered Richard," I would have a warm coat unless (除非) I was caught; In case (万一)
I would able to live in a warm room!"