问题
选择题
It’s hard to say what kind of person he is. Sometimes he is very nice; at other times he _______ be very cold.
A．must
B．will
C．shall
D．can
答案
答案：D
考查情态动词。must 必须，will 将会，shall 将会can 有时候可能会，句意：很难说他是哪种人。有时候他会很和蔼，有时候他非常冷酷。所以选D。