I called the airline to my flight reservation a week before I left for Canada.
A. expand
B. book
C. confirm
D. strengthen
网友回答
A. expand
B. book
(答案→)C. confirm
D. strengthen
解析：考查动词辨析：A. expand扩大，B. book预定，C. confirm证实，D. strengthen加强，句意：在我动身去加拿大之前我打电话到机场确认我的航班预定。选C。