A:Hi,Mike!Could you please play pingpong with me?

A:Hi,Mike!Could you please play pingpong with me?
B:I'm sorry,but I(1)
A Why?
B I have to stay at home to look (after) my granny
A (What's)the matter with her
B She said she had a cold
A I'm sorry to (hear) that.Did she go to see the doctor?
B Yes,I (2) her to the hospital this morning
A What did the doctor (3)?
B He said there was nothing(4)with my granny,but she has to be in bed (4)some time
A Are you coming later?
B I will (5) I can.I have to wait until my mother comes back
A ok.But now I have to ask Li Hua
A ok.But now I have to ask Li Hua (6)