亲,此处考查介词
across 主要表示从某物的表面 “横过”,涉及“面”的概念.常指从这一边到另一边
1.The bus
is coming across the bridge.
2.They often go to school across the
street.
3.Can you swim across the river
而through为在立体空间中的“穿过”.物体内部穿过
如：go through the forest“穿过森林”,