问题
Our monitor is the first person we can think of ________, for he is always willing to help ________ is in trouble.
A:relying on; whoever
B:relying on; whomever
C:to rely on; whoever
D:to rely on; whomever;
B:relying on; whomever
C:to rely on; whoever
D:to rely on; whomever;
正确答案是：
