We must obey the library rules.
我們必須聽從那兒的圖書管理員。
2.We must observe the library rules.
我們必須遵守圖書館的規則。
3.You are here in the library. You must obey library rules. You mustn"t smoke. You mustn"t little the floor.
你到了圖書館，就必須遵守圖書館的規定，不能吸菸，不能往地板上亂扔東西。
4.You must comply with the library rules.
你必須遵守圖書館的規則。
5.You mustn"t talking loudly in the library .
你不許大聲說話在圖書館
6.We must keep quiet in the library,so you mustn"t talk.
我們在圖書館裡一定要保持安靜，所以你一定不能講話
7.You must keep quiet.你必須保持安靜。
8.you must return the book on time.
你必須按時把借的圖書還給圖書館。
9.You must put the book back on the right shelf when you finish it.
當你看完的時候，你必須放回正確的書架上。
10You mustn"t draw or write anything on the page.
你不要在書上亂塗亂畫。
We must obey the library rules.
我們必須聽從那兒的圖書管理員。
2.We must observe the library rules.
我們必須遵守圖書館的規則。
3.You are here in the library. You must obey library rules. You mustn"t smoke. You mustn"t little the floor.
你到了圖書館，就必須遵守圖書館的規定，不能吸菸，不能往地板上亂扔東西。
4.You must comply with the library rules.
你必須遵守圖書館的規則。
5.You mustn"t talking loudly in the library .
你不許大聲說話在圖書館
6.We must keep quiet in the library,so you mustn"t talk.
我們在圖書館裡一定要保持安靜，所以你一定不能講話
7.You must keep quiet.你必須保持安靜。
8.you must return the book on time.
你必須按時把借的圖書還給圖書館。
9.You must put the book back on the right shelf when you finish it.
當你看完的時候，你必須放回正確的書架上。
10You mustn"t draw or write anything on the page.
你不要在書上亂塗亂畫。