have to后跟动词原形。根据句意结合语境可知该选C

【题目】完型填空

I work in a school library. There are many kinds of     in it. For example, books     English, science, history, music, and so on. You     do some reading or borrow books from it. But there are some      . You must follow them.

When you are reading in the library, you have to     quiet. Don’t talk loudly     make any noise. You     listen to music, either. You     take your bags or wet umbrellas into the library.     .or drink in the library. You can borrow books from the library,    you can’t lend(借出) them to others. You have to take good care of them and return them on time. If the library books are lost, you have to pay for them.

【1】A. people       B. books        C. magazines

【2】A. about        B. in           C. at

【3】A. can           B. have to       C. can’t

【4】A. magazines    B. rules        C. CDs

【5】A. /            B. are          C. be

【6】A. and          B. but          C. or

【7】A .don’t       B. can’t       C. have to

【8】A. aren’t      B. don’t        C. can’t

【9】A. No eating     B. Not eat       C. Don’t eat

【10】A. where        B. if            C . but