Tom hardly had time for concerts at that time, ________？

A．wasn't he

B．was he

C．did he

D．didn't he

朱某闲来无事做小买卖。李某告诉他，倒卖假文凭可以赚钱，他便从李某处购得一批利用伪造的高等院校印章制作的学历、学位证明出售，获利3万元。对朱某的行为应以伪造事业单位印章罪的共犯论处。