20. (2018郴州)—Why are you so excited?
—Nancy invited me ________ on a trip to Dongjiang Lake just now.
A. to go  B. go  C. going
20. A【解析】考查动词不定式。句意“你为什么如此兴奋？”“刚才南希邀请我去东江湖旅行。”invite sb. to do sth. 意为“邀请某人做某事”，故选A。