Walk across the road.(Say it in another way) _______ the road.
cross the road on foot
或者though the road.可是though是立体的穿过，如though the forest而cross是平面的穿过你说的对的那应该用crossacross,cross是横过的意思across是介词,通常在用go,run,swim.等搭配cross是动词,通常可以直接放在句子中