总机服务的功能包括（）。
A.总机查转、号百信息服务功能
B.统一号码接入服务功能
C.客户自服
D.电话会议功能
参考答案：A, B, C, D
There ____________ seven members in my family.[ ]
A. is
B. are
C. am
It is hard to imagine smells _____ when a film is shown in the future.[ ]
A. are given away
B. are put away
C. are sent out
D. are given out
