Rewrite the sentences using an -ing form.
1. It's good luck to find a four-leaved clover.
2. In Britain, many people think it's bad luck to spill salt.
3. In some countries people believe that it's lucky to see a black cat.
4. Dr Collins doesn't think that it's silly to follow superstitions.
5. Do you thonk it's good luck to find a coin?
6. It's all right to follow superstitions if it makes you feel secure.