问题
选择题
The factory produced a great number of computers, most of _______ shipped to foreign countries.
A．them
B．which
C．it
D．what
答案
答案：A
考查独立主格结构。这道题容易被认为是一个非限定性定语从句，若在shipped前面加上were 则选which。Most of them shipped to foreign countries 实际上是一个独立主格结构。选A。