他发誓要为父亲的死复仇。
He swore to ___avenge his father's death.
她为妹妹的死报了仇,让凶手付出了代价。
She ___avenged her sister's death by making the killer pay.
他发誓要献出自己的一生为蒙冤的朋友报仇。
He vowed to dedicate his life to ___avenging his wronged friend.