From mother’s love, patience and understanding, I have learned what a huge responsibility is to raise a child.
A. it
B. which
C. that
D. this
网友回答
(答案→)A. it
B. which
C. that
D. this
解析：考查指示代词。what a huge responsibility is to raise a child是what引导的宾语从句，作learned的宾语，宾语从句是一个感叹句的句式，正常句式应该是：it is a huge responsibility to raise a child。故选A。