1.She lost an English book whose cover is dark blue.
2.He has a penfriend whom he has never seen.
3.This is the way of life which she is looking forward to.
1.去掉it,这句话是定语从句,完整的应该是She moved to an old house which/that her parents left to her.定语从句中当关系代词在从句中作宾语时,可以省略.
2.help变为helps.定语从句中who指代的是the girl,所以从句中的谓语动词应该用单三.
3.变what为that,或者将all去掉.all that就等于what.
可以保证百分之百的正确率~