I am sure to get a good mark.(改为复合句)

问题描述:

I am sure to get a good mark.(改为复合句)
_____ _____ ____ _____that I will get a good mark.
该写句子,句意不变
They watched TV at home.They didn't see a film.
They watched TV at home___ ___ ____a film.

1.It is no doubt
2.instead of seeing