问题补充:
单选题Thestudentswere________overthe________problem,listeningtotheteacherwitha________expressionontheirfaces.A.puzzled;puzzling;puzzlingB.puzzled;puzzling;puzzledC.puzzling;puzzling;puzzledD.puzzling;puzzled;puzzling
答案:
B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。