问题补充:
The students were over the problem,listening to the teacher with a expression on their faces.
A. puzzled;puzzling;puzzling
B. puzzled;puzzling;puzzled
C. puzzling;puzzling;puzzled
D. puzzling;puzzled;puzzling
答案:
A. puzzled;puzzling;puzzling
(答案→)B. puzzled;puzzling;puzzled
C. puzzling;puzzling;puzzled
D. puzzling;puzzled;puzzling
解析:形容词辨析。Puzzled感到困惑的,通常形容人;puzzling令人困惑的,通常形容事物;expression表情,它与人有关,所以仍然用puzzled修饰。句意:带着困惑的表情听老师讲课,学生们对于那个令人困惑的问题感觉很困惑。
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