—Where on earth have they gone?
—I have no idea, but I wish I          .
A．knowB．knewC．would knowD．would have known
B
虛擬語氣題。Wish后的賓語從句用虛擬語氣，對現(xiàn)在的希望從句謂語動詞用過去是形式。 句意：他們到底去哪了？ 我不知道，但是我希望我知道。 選B
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