问题补充：
--- he have been chosen as captain of our school football team?
---Yes, he. Can’t you see he’s wearing an armband?
A. Can; can
B. Must; must have
C. Can; must have
D. Must; must
答案：
A. Can; can
B. Must; must have
(答案→)C. Can; must have
D. Must; must
解析：考查情态动词用法。本题考查的是情态动词对过去情况的推测，使用“情态动词+have done”的形式。Can have done通常用语疑问句否定句中。Must have done一定做了某事；表示对过去所发生事情有抱把握的肯定推测。句意：—你可能会被选为我们足球队的队长吗？—是的，他肯定已经被选上了。难道你没有看见他带着队长的袖标吗？故C正确。
