根据句意及所给汉语提示完成句子
1.我知道下一步该做什么.
I know ____ ____ ____ ____ .
2.他总是第一个来的学生.
He is always the first student ____ ____.
3.她有背课文的好方法.
She has a good way ____ ____ ____ ____ ____ ____.
4.黛比退学的决定让我们吃惊.
Debbie's decision ____ ____ ________ surprised us.
5.苏珊有许多朋友来交流.
Susan has many friends ____ ____ ____.