It is our parents ________ we depend when we are in trouble.

It is our parents ________ we depend when we are in trouble.
A、whoever
B、whom
C、on whom
D、that
【正确答案】:C
【题目解析】:whom 在句中做宾语,depend 后要接介词on,这里把on 提前与whom 连用,因此答案选C