问题补充:
My brother always his lesson, so he is a top student.
A. works hard at
B. work hardly at
C. work hard at
D. works hardly at
答案:
A. works hard at
B. work hardly at
(答案→)C. work hard at
D. works hardly at
解析:hard可用作形容词和副词,意思是努力的,坚硬的;hardly是副词,表示几乎不;句意:我的哥哥在学习上总是很努力,因此他是一个优秀学生。结合语境可知本句描述的是客观性的动作,故用一般现在时态。主语my brother表示单数第三人称含义,本句中hard用作副词,表示努力地。故选C。