问题
选择题
---I’ve told her many times, and she still forgot about it!
---I understand. It’s true that she___ be very forgetful sometimes.
A．can
B．should
C．ought to
D．must
答案
答案：A
考查情态动词。can 可能，表示理论上的可能性；should，ought to应该；must
必须，一定。It’s true that she___ be very forgetful sometimes表示她有时可能真的比较健忘。表示理论上的可能性。所以选A。