Wykorzystaj w odpowiedniej formie wyrazy podane w nawiasach:

9.1. My sister (used / have) ______________________ long hair but now it’s very short.
9.2. Probably, I (not / be) ______________________ very busy tomorrow.
9.3. My brother broke my favourite cup yesterday while (he / do) ____________________ the washing up.
9.4. Some board games like chess or GO (know) _________________ for hundreds of years.