i've been in this school for____ three months.为什么选D,

问题描述:

i've been in this school for____ three months.为什么选D,
A.past B,passed C,the passed D,the past

因为过去的三个月是确定的三个月,所以用定冠词the
passed只是pass的过去式.past是过去的 的意思