1.To fulfil the task,all (that) I need is your help.that引导定语从句
2.To fulfil the task,everything (that) I need is your help.that引导定语从句
3.To fulfil the task,what I need is your help.what引导主语从句
1.To fulfil the task,all (that) I need is your help.that引导定语从句
2.To fulfil the task,everything (that) I need is your help.that引导定语从句
3.To fulfil the task,what I need is your help.what引导主语从句