—I have tried very hard to find a soluti
题型：选择题
问题：
—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