1 . 选用下列情态动词的恰当形式完成句子。(否定式写缩写)

1. ____________you continue in your efforts and achieve greater success.
2. When I was young, I was told that I ____________play with fire.
3. It ____________be Jack. He has gone to Shanghai.
4. I didn’t send out my application form last week, but I ____________have.
5. You   ____________have washed all those clothes! We have a washing machine to do that sort of thing.