Inaddition,onecanenjoyhappinessandpeace（和睦）throughwhattheyhavedone,theythink,whtheythink做什么成分呢?然后,最后面which引导的定语从句的先行词是哪个呢?接上面未完的句子theythink,whichisthebes

Question

In addition ,one can enjoy happiness and peace（和睦） through what they have done,they think ,wh
they think 做什么成分呢?
然后,最后面which引导的定语从句的先行词是哪个呢?
接上面未完的句子they think ,which is the best return .

Answer 1

they think,是插入语,不用划入成分
which引导的非限制定语从句不是先行词,一前面的一句话“enjoy happiness and peace”
这是which同that的区别之一,which可以代表一句话