她在去年的网球比赛中击败了所有对手，成为冠军。

She defeated all her opponents in last year's tennis tournament and became the ___champion.

他一直是环境保护事业的坚定捍卫者。

He has been a dedicated ___champion of environmental protection.

她始终为妇女权利而奋斗。

She has always ___championed women's rights.