问题
选择题
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
答案
答案：C
puzzled形容词可以用来形容人，也可形容人的声音或表情。“他脸上带着困惑的表情，他发现专家所说的内容太难理解。”
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