14．________ is known to all is that the old artist，for ________ life is hard in the past，still works very hard in his seventies.
A．What；whom B．As；whom
C．It；whose D．As；whose
答案 A [for whom引导非限制性定语从句，主语是life。]
15．Surfing the Internet is popular nowadays，and，________ many schools are equipped with computers.
A．in case B．for instance
C．such as D．as such
答案 D [as such在此表示“正因为如此”。]
