问题
选择题
--- Why is Jenny still standing there? It’s so cold.
—She _____ for someone.
A.can wait
B.might have waited
C.must be waiting
D.should have waited
答案
C
考查情态动词中时态的使用。根据上文可知是在描述现在的动作,因此用情态动词+进行时,同时考查情态动词的含义,表示有把握的推测用must。