C.要学会分析句子结构；原句可缩句为：Mary was happy with the change .
whaterver doubts about their decision （to move to Chicago ） which her husband was having .
全句的意思：玛丽对于这种变化（指搬家去芝加哥）是高兴的,不管他的丈夫对他们搬去芝加哥的决定持有哪种的怀疑态度.
注意搭配：have doubts about sb or some ideas 对什么怀疑
be happy with sth.对什么满意,高兴
whaterver doubts about their decision （后面是定语从句,只是省略which ）her husband was having .
what doubt do you have about my decision?你对我的决定有什么怀疑?doubt 是名词,用what 来修饰,强调是用whateve.
明白吗?