21. Tom won’t do anything if you don’t tell him what to do.

àUnless…………………………………………………………………

22. He doesn’t get a job, so he can’t pay his bills.

àIf………………………………………………………………………..…

23. She isn’t fit because she sits around too much.

àIf……………………………………………………………………………

24. We can’t bathe in this part of river because the water is too dirty.

=> If………………………………………… ………………………….……..

25. We spend too much money on electricity because we have four air conditioners in our house.

=> If………………………………………… ………..