IV-Rewrite. 
1-Drive carefully or you may have an accident.       
->If you............................................................
2-Water these plants or they will die.        
-> If you..........................................................................
3 Hurry up or we’ll be late.               
-> If we..................................................................................
4-Read the instructions carefully or you can’t install the machine.->If.............................................
5-Don’t move or I’ll shoot.              
->If you...................................................................................
6-Don’t stay up late or you’ll be tired tomorrow.      
 -> If you......................................................
7-Don’t be lazy or you ‘ll fail the exam.     
-> If you......................................................................
8-I am not rich ,so I can’t buy a house .      
 -> If I were...................................................................
9-This car is expensive, so we can’t buy it.        
->If this car..........................................................
10-He doesn’t get high scores because he is lazy.   
 ->If he.............................................................
11-Money doesn’t grow on trees,we aren’t rich.       
-> If money .................................................
12-He is too short to play basket ball.       
-> If he........................................................................
13-We can’t go on a picnic because the weather is not fine.   
-> If the weather.................................
14-If I don’t live in a big city,I can’t go to the supermarket very often.    
-> Unless........................
15-I can’t buy a computer if I don’t have money. ->Unless........................................................
16.You can get high marks if you are not lazy.
->Unless …………………………………………………………….
17.We ‘ll go camping if the weather is not good.
->Unless………………………………………………………………..
18.If she is lazy,she will not pass the exam.
->Unless……………………………………….
19.If Nam doesn’t speak English everyday, he will easily forget how to use it. 
=> Unless ……………………………………………………………….
20. If you don’t return this book to the library today, you’ll have to pay a fine.
=> Unless ………………………………………………………………..
21. Unless he washed up the car now, his boss could ask him to do this.
=> If …………………………………………………………………
22. Unless they were lazy now, they would meet the headmaster.
=> If …………………………………………………………………
23. If I didn’t have the number, I would not ring her up.
=> Unless …………………………………………………………………
24. If my sister didn’t get a terrible headache she wouldn’t be absent from her class.
=> Unless ………………………………………………………………… 
Giải giúp với ạ :3