In all kinds of petitions, Jackie a most excellent athlete. He has won so many golden medals.
A. practises
B. conducts
C. behaves
D. proves
网友回答
A. practises
B. conducts
C. behaves
(答案→)D. proves
解析：考查词义。Practises练习；.conducts行为，管理；behaves表现，行为；proves证明。句意在各种比赛中，Jackie证明是一个最优秀的运动员。他以赢得如此多的金牌。所以选D。