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

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