30.

　　A. His friend gave him the wrong key.

　　B. He didn't know where the back door was.

　　C. He couldn't find the key to his mailbox.

　　D. It was too dark to put the key in the lock.

　　31.

　　A. It was getting dark.

　　B. He was afraid of being blamed by his friend.

　　C. The birds might have flown away.

　　D. His friend would arrive any time.

　　32.

　　A. He looked silly with only one leg inside the window.

　　B. He knew the policeman wouldn't believe him.

　　C. The torchling made him look very foolish.

　　D. He realized that he had made a mistake.

　　Passage Two

　　My friend Vernon Davies kept birds. One day hephoned and told me he was going away for a week.He asked me to feed the birds for him and said thathe would leave the key to his front door in mymailbox. Unfortunately, I forgot all about the birdsuntil the night before Vernon was going to return.What was worse, it was already dark when I arrivedat his house. [30]I soon found that the key Vernon gave me could not unlock either the frontdoor or the back door. I was getting desperate. [31]I kept thinking of what Vernon would saywhen he came back. I was just going to give up when I noticed that one bedroom window wasslightly open. I found a barrel and pushed it under the window. As the barrel was very heavy, Imade a lot of noise. But in the end, I managed to climb up and open the window. [32]I actuallyhad one leg inside the bedroom when I suddenly realized that someone was shining a torch upat me. I looked down and saw a policeman and an old lady, one of Vernon's neighbors.

　　"What are you doing up there?" said the policeman.

　　Feeling like a complete fool, I replied, "I was just going to feed Mr. Davies' birds."12:01 2015-6-12

　　Questions 30 to 32 are based on the passage you have just heard.

　　30. Why couldn't the man open the door?