问题
选择题
----Will Barbara come to our party?
----I am not sure, because he ____ go to the concert with his friend.
A．can
B．must
C．should
D．might
答案
答案：D
考察情态动词。A可能；B一定；C应该；D也许；结合句意可知D正确。句意：—芭芭拉要来我们聚会吗？—我不敢肯定。因为他也许和朋友去听音乐会。