根据上句改写下句,使上下两个句子意义相同或相近,一空一词.

问题描述:

根据上句改写下句,使上下两个句子意义相同或相近,一空一词.
1.It will take us at least two days to plant these trees.
We will _____ at least two days _____ these trees.

spend……on