Помогите упражнение 3 . Вставьте нужную форму вспомогательного глагола BE (am,is,are) в предложения
1.Kelly_washing her dress in the bathroom.
2.Our teacher_writing something on the blackboard.
3.It _getting dark.
4.The birds_singing sweetly in the garden.
5. I _preparing for my report at the moment.
6.The children_decorating the hall for the party..
7.People_speaking quietly in the conference-hall.
8.You_waiting for the call.