I don,t know which one _____ (choose)

问题描述:

I don,t know which one _____ (choose)

to choose(动词不定式短语)

chosen,省略了 to be

to choose which one to choose是wh- to do 结构,不是从句.1.该结构起名词作用,作主语、宾语、表语、同位语.I didn't know how to choose .2.wh-词如果是副词,如where\when\how等,作to do 的状语;如果是代词,如what...