Ex. 1 Choose the correct item

Ex. 1 Choose the correct item

1. If Ann is buying a new computer, he will let us use it.
2. I won't do it, unless you ask me nicely. You must learn to be polite.
3. If you exercise regularly, you can have more energy.
4. When babies are happy, they smile.
5. Unless you go to bed early, you will be tired in the morning.