He can hardly stay awake because he is so tired, _______?
A. does he B. isn’t he
C. can’t he D. can he
He can hardly stay awake because he is so tired, _______?
A. does he B. isn’t he
C. can’t he D. can he
D 句中关键词hardly(几乎不)表否定含义,根据反意疑问句“前肯后否,前否后肯”的原则可排除B、C两项;由主句中的情态动词can可知选D。