Ex4: Viết lại câu sao cho nghĩa không đổi: 1.Unless you change your mind, the company won't refund the money. If you................................................................................... 2.We can go unless it rains. If.......................................................................................... 3.If it doesn't rain, there will be a shortage of water. Unless................................................................................... 4.Unless she starts at once, she will be late. If........................................................................................... 5.You will lose your job. You are late again. If.......................................................................................... 6.If he doesn't hurry, he will miss the train. Unless.................................................................................. 7. If you don’t relax,you will be tired. -> If……………………………………………………………………….. 8. If you are not careful , you will break the vase. -> Unless…………………………………………………………….. 9. Chris will pass his exams .He works hard. -> If…………………………………………………………………………….. 10.Unless she get up early, she will be late. If........................................................................................... 11.If the weather isn’t fine, we won’t go camping. Unless................................................................................... 12.We can’t go out unless we find the keys. If...........................................................................................