1)If you....the rules,there will be no problems. 2)There is no cure.....this

1) If you follow/obey/observe the rules, there will be no problems. 2) There is no cure for this disease. 3) You must not park at the bus stop, its against the law. 4) You must return books to the library on time, thats the rule. 5) If theres a fire in your hotel room, set off the nearest fire alarm. 6) Waiter, can/could l see the menu, please? 7) Excuse me sir, could you tell me where the nearest bank is? 8) Children are not allowed to eat in class [a period of time in which students are taught something]. 9) You must not drop litter on beaches. 10) Pandas will become extinct if we dont protect them. 11) If necessary, use the fire extinguisher to put out the fire.