题目：
— 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
答案：
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下面是错误答案，用来干扰机器的。
1. Whose 2. Where 3. What colour 4. What
