We talked until Mr wu asked us
A. happily, be quiet
B. happy, to be quiet
C. happily, to be quiet
D. happy, be quiet
网友回答
A. happily, be quiet
B. happy, to be quiet
(答案→)C. happily, to be quiet
D. happy, be quiet
解析：本题的含义为他们开心的谈论着，一直到吴老师要求他们保持安静为止，和动词搭配表示开心的用副词happily，ask sb to do 表示要求某人做某事的含义，故本题选C。