题目内容：
阅读下列短文，回答题。 提示：Jack去图书馆借书，但没有借书证(1ibrary card)。图书管理员Linda为他办理了借书证，并告诉他每本书可借两个星期，如果需要，可以续借。
Linda: Good morning．51 ?
Jack: Yes, I want to borrow a book．
Linda: 52 ?
Jack: No, I don't have one now． 53 ?
Linda: Well, please fill in this form first．
Jack : OK． (A few minutes later． ) Here' s the completed form．
Linda: Thanks． The card will be ready in thirty minutes, and you can take it later．
Jack : Thank you． By the way, 54 ?
Linda: Well, two weeks． But then, you can renew the book if you still need it．
Jack: I see． Thanks a lot．
Linda: 55 ．
第51题 ________
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