用所给词的适当形式填空。
1. The old man saved his money ______(buy) a colour TV.
2. You should be ______ (care) when you use credit cards to buy things online.
3. It's important ______(learn) a foreign language.
4. Don't forget ______(turn) on TV when it's time for the weather report.
5. We went to the cinema ______ (with) Lily, because she was ill.