The look on his face suggested that what the monitor said was .A. puzzling; puzzledB. puz

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A. puzzling; puzzled
B. puzzled; puzzled
(答案→)C. puzzled; puzzling
D. puzzling; puzzling
解析：考查puzzled与puzzling的区别，puzzled 感到困惑的，修饰人或与人有关的眼神、嗓音、表情等等，puzzling 令人困惑的，修饰物，句意：他脸上困惑的表情暗示了班长所说的话令人困惑。故选C。