表达应该做与不应该做的句型 — 英语阅读题

Read the passage and answer the question. In the school library, there are some rules. We should keep quiet when we read books. We should put the books back after reading. We shouldn't talk loudly, because it will trouble others. We shouldn't eat or drink in the library, because it is bad for the books. Xiao Ming always follows the rules. He is a good boy. Question: What should we do and what shouldn't we do in the library? Please write two sentences with "should" or "shouldn't".（用 should 或 shouldn't 写出两个图书馆里的规则）