—Are you coming to Jeff's party?—I'm not sure.I go to the concert instead.A. mustB. would

网友回答

A. must
B. would
C. should
(答案→)D. might
解析：
根据I'm not sure判断，表示说话者不确定，有可能去音乐会。might表示“可能”；must表示“必须，一定”；would表示“将，愿意”；should表示“应该”。