(2013·重庆高考)—What are you doing this Saturday?
—I'm not sure, but I go to the Rolling Stones concert.
A. must
B. would
C. should
D. might
网友回答
A. must
B. would
C. should
(答案→)D. might
解析：选D 考查情态动词。由答语中的“I'm not sure”可知，答话人对自己的安排还不能确定，因此用might，表示“可能，或许”。must表示肯定的推测，意为“必须，一定”；would表示意愿；should表示“应该”。