What ______ the doctors most was that they could not find the cause of the disease.
A．a(chǎn)stonishedB．puzzledC．surprisedD．a(chǎn)mused
B
astonish“令人吃驚”；puzzle“令人迷惑”；surprise“令人吃驚”，程度小于astonish；amuse“令人發(fā)笑”。由句意可知B項(xiàng)為正確答案。
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