单项选择题
M: There’ll be a meeting after class. Are you coming, Helen
W: After class I’m sorry, Mike. I’m afraid I can’t.
M: But it’s quite important. It’s about our helping about Bob.
W: Oh, I have to go home after class.
I’ll take care of my mother. She’s iii today.
M: I’m sorry to hear that. Then we’ 11 have the meeting without you. And I’ll tell you the meeting tomorrow morning.
W: Thanks. I’m really sorry to have to miss the meeting.
A．Because she has to do cleaning.
B．Because she has to meet Bob.
C．Because she has to come home and look after her mother.