阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。
A
Borrowing Policies
The Henry G. Bennett Memorial Library provides materials and services to meet the information needs of graduate and undergraduate students, face-to-face and online learners aswell as teachers and community members.
Borrowing for Students
General Collection; 21 days（fall and spring）; 14 days（summer）
Curriculum Collection; 7 days（fall and spring）; 7 days（summer）
Borrowing for Teachers
General Collection: 90 days（fall and spring）; 90 days（summer）
Curriculum Collection: 90 days（fall and spring）; 90 days（summer）
OK-Share Card
Any teachers or students of any OK Share institution may use the collections of any OK-Share library on site. Upon completion of the OK Share card application at their home library, teachers or students will be given an OK Share card.
Services
OK Share card borrowers are allowed two books in their possession at one time. Electronic tools may not be available to the OK Share card borrowers,
Inform the library you use immediately if your card is lost or stolen. A $ 5.00 charge fora second OK Share card must be paid to the lending library.
Books should be returned to the library where the library materials were borrowed. Materials returned by mail should be sent by first class, insured mail. Materials sent by post office must be insured for at least $ 100.
Billing
The library is not responsible for informing borrowers that materials are overdue. OK-Share card borrowers are billed for fines for materials returned late.
21. What is the similarity for teachers and students to borrow materials?
A. They can keep them for 90 days anyway.
B. They all can borrow them in winter.
C. They can keep them in autumn for 14 days.
D They can keep either General or Curriculum collections.
22. Which is possible for OK-Share card borrowers?
A. Borrowing two books at a time. B. Using necessary electronic tools.
C. Getting another card for free. D. Getting materials mailed for free.
23. What will the library do if borrowers can't return books on time?
A. Tell them the date in advance. B. Punish them by fining them.
C. Post a fine bill to the them. D. Force them to hand in the OK Share card.
