Помогите дополнить предложения следующими словами: can, can't, mustn't, have to, don't have to, had to, didn't have to 1. When I was younger I could do gymnastics very well, but now I (...). 2. My sister (...) sing really well....

Помогите дополнить предложения следующими словами: can, can't, mustn't, have to, don't have to, had to, didn't have to 1. When I was younger I could do gymnastics very well, but now I (...). 2. My sister (...) sing really well. She sings in a group. 3. You (...) wear special clothes to climb a mountain. 4. You (...) clean the car — I've done it. 5. I (...) forget my mum's birthday this year — last year I forgot! 6. We (...) walk up the stairs yesterday because Peter is afraid of lifts. 7. The school bus didn't arrive this morning but I (...) walk to school — my dad took me.