It is a puzzle to me that Steve who has been working （） wants to quit the course. A.diligently
It is a puzzle to me that Steve who has been working （） wants to quit the course. A.diligently
B.frequently
C.unwillingly
D.casually答案：A 难度：1知识点：词汇与结构部分\辅导书\书A\词法A
A.diligently
B.frequently
C.unwillingly
D.casually
正确答案：A
解析:词汇与结构部分\辅导书\书A\词法A