There was a _____ look on his face. He found what the expert said too difficult

题干

There was a _____ look on his face. He found what the expert said too difficult to understand.

A．puzzle

B．puzzling

C．puzzled

D．to puzzle

上一题下一题 0.85难度单项选择更新时间:2011-11-11 10:00:24

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