3. (2018安顺)He can hardly stay awake because he is so tired, ________？
A. is he  B. isn't he  C. can't he  D. can he
3. D【解析】考查反意疑问句。句意：他几乎不能保持清醒因为他太累了，？反意疑问句应根据主句变，而不是原因状语从句部分，又因主句部分含有“hardly”，表示否定意义，谓语中出现了情态动词can，因此应用“can he”反问。故选D。