完形填空

　　When you have a post office box, the postman does not bring letters to you, but you have to go to the 1 and get your letters and parcels (包裹) from your box. The box is locked, and you have the key, so the letters are quite 2 .

　　One day, Mr Brown, the 3 of a school, wrote to the post office and asked for a post office for his school. He soon got an answer. It 4 , “We will give you a post box 5 one month.”

Two months later, Mr Brown wrote to the post office 6 and said, “Why haven't we got a post office box yet?”

　　Five months later, there was still 7 news. Mr Brown was 8 angry that he went to the office and asked why. The postman said, “We have written two letters to you and told you to get the 9 to your post box back, but you didn't 10 .” “Where are the letters?”“We sent them to your post box.”

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