保持下列句子句意不变.下面的句子怎么做?

1.He doesn't know what he should do next.(保持句意）
He doesn't know___what____ ______to______ ____do______next.
2.Can you teach me how I can make a cake?(保持句意）
Can you teach me__how___ ____to____ ____make____ a cake?
3.My parents will tell me which way I should go.(保持句意）
My parents will tell me ___which___ ____way____ _____to_ ____go____.
4.Did they tell you where you would go?(保持句意）
Did they tell you ____where_ ___to___ _____go___?
5.We heven't decided when we will have the class meeting.（保持句意）
We haven't decideb ____when____ ___to_____ ____have______ the class meeting.