25. ---I haven’t got the reference book yet, but I’ll have a test on the subject next month. ---Don’t worry. You______ have it by Friday. (A) could (B) shall (C) must (D) may

31. ----I have tried very hard to find a solution to the problem, but in vain. ----why not consult with Frank? You see, _________. (A) great minds think alike (B) two heads are better than one (C) a bird in the hand is worth two in the bush (D) it’s better to think twice before doing something