听问句，选答句。
（1）A．She is a doctor． B．She can sing． C．She is singing．
（2）A．At home． B．On Monday． C．At 7：20 a．m．
（3）A．Jan．1st． B．Oct．1st． C．Aug．1st．
（4）A．Because I can skate． B．Yes，I do． C．I like winter best．
（5）A．Yes，they are． B．Yes，it is． C．That's interesting．