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----I have tried very hard to find a solution to the problem, but in vain ----why not

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

参考答案
正确答案:B