问题补充:
He didn’t understand the question, so there was a expression on his face.
A. puzzling; puzzled
B. puzzling; puzzling
C. puzzled; puzzled
D. puzzled; puzzling
答案:
(答案→)A. puzzling; puzzled
B. puzzling; puzzling
C. puzzled; puzzled
D. puzzled; puzzling
解析:前空令人困惑的问题;后空困惑的表情。