2008年5月12日，四川省汶川县发生了里氏8.0级大地震，兰州某中学师生自愿捐款，已知第一天捐款4800元，第二天捐款6000元，第二天捐款人数比第一天捐款人数多50人，且两天人均捐款数相等，那么两天共参加捐款的有（    ），人均捐款（    ）．

—John, what was your sister doing while you _____ the piano?

—Oh, she _____ with toys.[ ]

A. played; played

B. played; was playing

C. were playing; played

D. were playing; was playing