when are they __in their planhand to hand handedgive

when are they __in their plan
hand
to hand
handed
give

to hand ,这里有一个are ,所以用to hand 来做表语

when are they hand in their plan 他们什么时候提交计划/方案

they are to hand in their plan ,这里用的是不定式表示将来！他们何时递交他们的计划！前者回答有问题！谢谢

When are they to hand in their plan.