Viết lại câu sao cho nghĩa của câu không thay đổi

V.Viết lại câu sao cho nghĩa của câu không thay đổi.(Rewrite the sentence so that its meaning does not change.): 1,Unless you study harder,you'll fail the next exam.=>If.....................................  2,Unless he practices writing every day,he can't improve his writing skill.=>If......................................  3,Unless you returns this book to the library today,you'll have to pay.=>If...............................................  4,Unless you stop wasting money,you will run out of it.=>If..............................................  5,If you don't stop smoking,you will fall seriously ill.=>Unless...........................................  6,The teacher will be furious if you don't do your homework.=>Unless.........................................  7,You can't go on vacation if you don't save some money.=>Unless....................................  8,We'll arrive on time if we hurry.=>Unless.....................................  9,If you exercise regularly,you'll be able to lose some weight.=>Unless.........................................  10,You won't get well unless you stop smoking.=>If.......................................