Throwing their hats into the air, the fans of the winning team loud shouts of victory.
A. let down
B. let in
C. let go
D. let out
网友回答
A. let down
B. let in
C. let go
(答案→)D. let out
解析：考查词组：A. let down使…失望，B. let in让…进来C. let go放手D. let out发出，泄漏，句意：把帽子扔到天空，获胜球队的粉丝发出胜利的欢呼。选D。