有这样一道改错题(位于动词accompany 词条后面):
1. Once he made bold to ask her to accompany him to go to a party.
2. I have two tickets for thetheatre on Saturday evening—would you care to accompany with me?
There are a great many careers in which the increasing emphasis is on specialization.这句话中的in which应怎么理解,从句是在哪里结束的?specialization搭配的是on还是in?这种介词+which的组合的语法结构是怎么样的.