there is no difficulty ___ we can overcomeA that B which C who D what

问题描述:

there is no difficulty ___ we can overcome
A that B which C who D what

定语从句,difficulty 是先行词,而且被 no修饰只能用that,that 是关系代词在定语从句中作主语.整句话的意思是:世上没有我们能克服的困难
A that