1与2好像应该是这样(从大多数文法常见问题来看):
1.She married again,which was unexpected.
2.She married again,as was expected.
as引导的从句一般于主句表同意,而which则没有限制.也就是说,第一句中不能填as,因为从句是说“没有预料到”,与主句反义.
3.首先,更正楼主的一个搭配错误,即in the way表方式,不应用by.
-This is the best way to solve the problem.
-This song is suggested to listen to.
以上两句话没有问题吧?为什么第一句中不说“solve the problem in”呢?这与第三题是同一道理.