This is the computer（）we have had so much trouble.
A、
to which
B、
at which
C、
with which
D、
of which
【正确答案】：C
【题目解析】：
本题考查的是定语从句连接词的使用。
先行词为computer，连接词用which，从句中结构have trouble with sb/ sth…意为“在/跟….有困难、有问题”，介词with 置于which之前，故选择C选项。
句意：这就是那台我们发现有问题的电脑。