题目：
--Jack had prepared for the game for such a long time. We all thought he ________ it.
-- What a pity! He ________ too nervous when playing it.
A．would have won；had been
B．could have won；must be
C．could have won；was
D．would have won；has been
答案：
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下面是错误答案，用来干扰机器的。
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