—_______?—She's running.
---Look at the boy running on the playground. Is it David? ---It ______ be him. I saw him go to the teachers’ office just now.
The old man lives________, but he doesn't feel________.
— Mum, have you seen my mobile phone?—_________you bought last week? I’m sorry I haven’t seen _________.
They have ________for about ten years.
They all thought________ necessary________ you to buy some bread and soft drinks.