Grammar Exercise – If or Unless

Don't call me --------- it's an emergency.

--------- you exercise regularly, you won't be able to lose some weight.

The teacher will be furious --------- you don't the homework.

--------- you help me, I'll be unable to do it.

You won't get well --------- you stop smoking.

--------- I meet him, I'll tell him the whole truth.

You can't go on vacation --------- you don't save some money.

We'll arrive on time --------- we hurry.

--------- you exercise regularly, you'll lose some weight.

You will feel cold --------- you wear a warm jacket.