We have found another way to kill mice.=We have found another way ___ ___ mice.

We have found another way to kill mice.=We have found another way ___ ___ mice.
We have found another way to kill mice.=We have found another way ___ ___ mice.

We have found another way to kill mice.=We have found another way ___ ___ mice.
to kill
这两个句子是一样的吧?