When___ ___ ___ ____(使用地图),we must pay attention to the following thwings :the titel,

问题描述:

When___ ___ ___ ____(使用地图),we must pay attention to the following thwings :the titel,
the norter ,symbols and the scale.这么长句英语,中间的那四个空怎么填啊

When_the__ __map_ __is_ __used__(使用地图),we must pay attention to the following thwings :the titel,