23.—why, Jack, you look so tired! ---Well, I _____the house and I must finish the work tomorrow. (A) was painting (B) will be painting (C) have painted (D) have been painting

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