before we cross the road ,we must stop and look both ways .改为同义句怎么改?

问题描述:

before we cross the road ,we must stop and look both ways .改为同义句怎么改?

We must stop and look both ways before crossing the road.格式是这样的before we _______the road ,wemust stop and look both ways ,怎么填啊?go across