Ответ:

Helen: I rang you at 8 pm last night, but there was no answer. What (a) were you doing?

Luke: My mum and I (b) were visiting my grandmother in hospital.

Helen: Oh, no! Why was she in hospital?

Luke: Yesterday morning she (c) wasn’t feeling well at all, so we took her there.

Helen: I see. What (d) was she doing last night when you visited her?

Luke: We were surprised because she (e) wasn’t lying in bed. She (f) was sitting on a chair. All the patients (g) were having dinner and they (h) were chatting and laughing. So everything’s OK!