The cat given some milk to drink.
The cat was giving some milk to drink.
The cat was gave some milk to drink.
The cat was given some milk to drink.
本题考查的是陈述句的被动语态转换。
give动作的实施者是someone，cat与give的逻辑关系是被动。
句意：这只猫被给了一些牛奶喝。
Someone gave the cat some milk to drink.=The cat was given some milk to drink.
