Thank you for your interest in Caliber Cassette （盒式录音带 ) library. This letter tells y

ou about our service. With it we are sending you an application form, so that you can join if you would like to try it. Caliber library aims to provide the pleasure of reading to anyone who cannot read ordinary print books because of sight problems. We currently have over 7,000 books available for reading for pleasure, including l，000 specially for children. A11 0ur books are recorded cover-to-cover on ordinary cassettes and can be played on any cassette player. They are sent and returned by post, free of charge.

When we receive your application, we will send you a hook and an information Tape.They will explain how to use the service. The easy way to use Caliber library is to tell us what sorts of books you like. and we will keep you supplied with books we think you will enjoy. Or you can send us a list of books you would like to read, and we will then send you books from this list whenever possible. In that case you will need to use our website, or buy one or more of our catalogues (目录 ).

According to the first paragraph, the library sends the application form. to the readers so that they can_____.

A.read ordinary books

B.order cassette players

C.buy Caliber cassettes

D.use the library service

Caliber library provides service mainly for people who suffer from________A.hearing difficulties

B.mental illnesses

C.sight problems

D.Heart troubles

The service of sending and returning books by post is_____.A.not available to children

B.paid by the users

C.free of charge

D.not provided

The easyway to usethe library service is to______ .A.inform the library your name and address

B.Tellthe library the sorts of books you like

C.buy the catalogues of the library

D.askthe library to buy the books

The main purpose of this letter is to _______.A.introduce the library' s service to readers

B.recommend new books to the readers

C.send a few catalogues to readers

D.express thanks to the readers

请帮忙给出每个问题的正确答案和分析，谢谢！