asleep        a knock at the door awakened her．

A．Scarcely had she fallen than

B．No sooner did she fall; than

C．Hardly she had when when

D．Scarcely had she fallen; when

手机邮箱（商务版）的主要功能包括（）。

A.邮件自动推送

B.安全收发邮件

C.支持新建、回复、转发邮件

D.支持管理功能