服务员在（）时应对住客房内的小酒吧逐一查核，如有饮用，及时补充并开好账单。
A.上午换茶具
B.清理房间
C.晚间做夜床
D.访客走后
参考答案：A, C
—Are you pleased with what he has done?
—It couldn’t be____. Why didn’t he put more effort into his work?
A．any worse
B．much better
C．so bad
D．the best
