There was a __________look on her face because a________ problem _________the little girl.
A．puzzled; puzzled; puzzledB．puzzling; puzzling; puzzled
C．puzzled; puzzling; puzzledD．puzzling; puzzled; puzzling
B

試題分析：考查puzzle用法。Puzzling令人困惑的(常用來形容事物)；puzzled感到困惑的（常用來形容人）；有些與人有關的事物也用puzzled修飾；第三空是謂語動詞，因為本句是過去時，所以使用過去式puzzled。句意：在他的臉上有一個困惑的表情，因為一個讓人困惑的問題困擾著這個小女孩。故B正確。
點評：Puzzling令人困惑的(常用來形容事物)；puzzled感到困惑的（常用來形容人）；有些與人有關的事物也用puzzled修飾；
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