I always eat my breakfast ( ) going to school in the morning.介词填空

问题描述:

I always eat my breakfast ( ) going to school in the morning.介词填空

I always eat my breakfast (before) going to school in the morning.
我经常在去学校前吃早饭
先吃饭后去学校,这是原则问题.学校不允许带吃的.