语法填空什么时候用what,when,that,where,who,while,whom,which,答:John got engaged to her when travelling last winter.去年冬天旅行时,约翰与她订了婚.3.that (1)代词 pron.那;那个,那人,那事,那东西 That's my English teacher over there.那边是我的英文老师.(2) 用作关系代词,引导关系从句)He said that he got up late yesterday.4.where (1)(用作...