10. If he doesn't take the examination, he —— fail.
11. I am determined that I —— win.
12. I —— sail probably on the fifteenth.
13. He —— be twenty-one to-morrow.
14. I —— go in spite of him.
15. —— you go by train, do you think?
16. I —— be greatly obliged if you —— send the book at once.
17. I promise you John —— know his lesson to-morrow.
18. —— you be at home this evening?
19. —— the train be on time?