问题
选择题
. My pain ___________ obvious the moment I walked into the room, for the first man I met asked me pitifully:" Are you feeling all right?"
A．must be
B．must have been
C．could be
D．could have been
答案
答案：B
考查情态动词的用法。句意“我一走进房间，就觉得我的疼痛是很明显的；因为遇到的第一个人关心地问道‘你没事吧？’。”must have done表示肯定的推测，因为“一定已经做了某事”。故选B。