1/Be silent or you will not hear any words If…………………………………………………… 2/Don’t be careless or you will break the vase If………………………………………………… 3/Unless it rains, they will go go hopping If………………………………………………………. 4/Unless they are interested in studying,they will not pass the test If……………………………………………………….. 5/Don’t leave the lights on all night or you will waste electricity If………………………………………………………………… 6/Spend a lot of time to do exercises or you will feel bad If………………………………………………….. 7/If he doesn’t start at once,he will be late for the train Unless…………………………………………………. 8/If I don’t have a quiet room,I will not be able to do any work Unless………………………………………………………….. 9/Be happy or you will be old before your age If……………………………………………………. 10/Don’t sit here or you will have a accident