1)They having(или building, вроде и так и так можно) a new hotel in the city centre at the moment.
2)Look! Somebody is swimming in the river
3)You are standing on my foot. Oh I’m sorry.
4)Hurry up! The bus is coming.
5)Where are you George? In the kitchen. I am cooking a meal.
6)(On the telephone) Hello. Can I speak to Ann please? She is having a shower at the moment. Can you phone again late?