她经过多年的训练终于成为网球冠军。

After years of training, she finally became the tennis ___champion.

他一直是环保事业的坚定捍卫者。

He has been a strong ___champion for environmental protection.

她多年来一直为妇女权利奔走呼吁。

She has ___championed women's rights for many years.