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．