When you have a post-office box, the postman doesn’t bring letters to you, but you go to t

When you have a post-office box, the postman doesn’t bring letters to you, but you go to the post-office and get your letters and parcels from your box. The box is locked, only you have the key, so the letters and parcels are safe.
One day 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 said, “We will give you a post-office box in one month.”
Three months later, the headmaster wrote to the post-office and said, “Why haven't we got a post-office box yet?”
This was the answer from the post-office:
“Dear sir,
We gave you a post-office box two months and wrote to you then to tell you. Here is the key to your box. You will find our letter to you in it.”
【小题1】When you have a post-office box,     .A．it is easier for you to write lettersB．you will have more letters than parcelsC．you get your letters in front of your houseD．you got to the post-office to get your letters【小题2】The word “key” in this passage means     .A．邮件B．密码C．编号D．钥匙【小题3】The headmaster     .A．wrote many letters to the post-officeB．didn’t like the postmanC．didn’t know how a post-office box workedD．forgot to pay for the post-office box【小题4】When the post-office said that you could get a post-office, he meant     .A．you may go to the post-office to get your mailsB．you must wait to get the post-office boxC．you must write again to get the keyD．you must pay for the box before you got it【小题5】Which of the following might not be true?A．If you want to get a post-office box, you must let the post-office know.B．When you get a post-office box, you have to do the work of a postman.C．You go to the post-office to get the key to your box.D．After you get a post-office box, the post man will not send mails to your house.D