用所给单词的适当形式填空，必要时加助动词或情态动词。

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

One day Mr. Black, the headmaster of a school, wrote to the post office and asked for a post office box for his school. He soon got an answer. It （3）_______（say）, “We （4） ________ （give）you a post box in one month.”

Two months later, Mr. Black wrote to the post office again and said, “Why haven’t we got a post box yet?”

    Five months later, there was still no news. Mr. Black thought he （5） _____ （not wait） anymore. He was so angry that he went to the post office and （6）_______ （ask）why he had no reply. The postman said “We had written two letters back and told you （7）__________（get）the key to your post box ,but you （8）______（not come）.” “What （9） ______ you ______ （say）? Where are the letters?” said Mr. Black quite angrily. “We （10）______ （send） them to your post box.” The postman said.