we can buy three tins of dog food with that.此句中的with
问题描述：
we can buy three tins of dog food with that.此句中的with
答
that 指代上文提到的钱,with 是 “用”的意思.
with that 用那些钱
完整的句子应该是：
we can buy three tins of dog food with the money .
我们可以用那些钱买三听狗食.