----Did you make it at last? ----Yes. But for your help, it _____ a serious loss.
______I be free tomorrow,I could go with you.
______stopping polluting the earth______hope to live in a better environment.
You______be tired—you've only been working for an hour.
Father______for London on business upon my arrival,so I didn't see him.
The success of this project______everyone making an effort.