1.

I always (get) bad-tempered if my shoes (be) uncomfortable.

I always GET bad-tempered if my shoes ARE uncomfortable.

2.

If you (borrow) my jacket, what I (wear)?

If you borrow my jacket, what WILL I WEAR? If you borrow my jacket, what CAN I WEAR?

3.

She (not be able to) wear her new belt if she (wear) the blue dress.

She WON'T BE ABLE TO WEAR her new belt if she WEARS the blue dress.

4.

Unless he (change) his clothes, he (have to) stay at home.

Unless he CHANGES his clothes, he WILL HAVE TO stay at home.

5.

If I (finish) knitting this sweater, you (take) it on holiday with you.

If I FINISH knitting this sweater, you WILL TAKE it on holiday with you. If I FINISH knitting this sweater, you CAN TAKE it on holiday with you.

6.

If you (want) to pass your FCE examination, (visit) OM Personal!