The lead singer was ill and couldn’t sing that night, and her didn’t perform well, which made the audience disappointed.
A. attitude
B. substitute
C. institute
D. altitude
网友回答
A. attitude
(答案→)B. substitute
C. institute
D. altitude
解析：句意：那天晚上领衔歌手生病无法演出，她的替补表现得也不好，这让观众很失望。 substitute意为“替换者；替补”，符合句意。attitude意为“态度”， institute意为“学会，协会；学院”， altitude意为“高度；海拔”。