Rewrite the sentences using if and unlles

5 If I exercise regularly, my body will stay healthy.  6 If Chloe studies,she will get good marks.  7 If you learn some stress-management techniques,you will know how to deal with stress.      8 If you call,they won't be worried.  9 If Mr and Mrs Jones leave the house at 9:00 am, they won't miss their flight.  10 If we think positively,the problem won't be worse.