Не совсем понял задание, но кажется вы имели ввиду это:
1. Is Polina clapping her hands now?
2. Are Denis and Alex stamping their feet now?
3. Is Vanys putting on a T-Shirt?
4. Am i taking off my mac?
5. Are Diana and Dasha dancing?
6. Are Asya and I flyung a kite (Не совсем корректное предложение)
7. Are the children standing in the garden