20. When he was at college, he ____ go to that coffee shop near the school after school every day.

　　　 A. would　　　　　　　 B. had better　　　　　 C. should　　　　　　　 D. might

19. ---You cannot finish the book in less than an hour, I suppose, can you?

　 ----______.

　　　 A. No, hardly　　　　 B. Yes, I’m sure I can.　 　　　 C. Sorry, I can’t　　 D. I don’t think I can

18. The newly-learned words will soon be forgotten _______ they are frequently used in everyday communication.

　　　 A. if　　　　　　　　　　 B. even if　　　　　　　　　　 C. so long as　　　　　　　　 D. unless