Rewrite the sentences

1. If it isn't sunny, we can't go for a picnic .
Unless ................................................
2. If Mai doesn't listen care fully, she can't in stall the machine 

Unless ..................................................................................

3. If they don't go out now, they will be punished .
Unless ................................................................
4. Unless he does the test carefulyy , he can't get good marks .
If ............................................................................................
5. Unless they try their best, they won't pass the exam .
If ..................................................................................