7. When they finally __________, it was already very late. A. arrived B. reached 选哪个,为什么
问题描述：
7. When they finally __________, it was already very late. A. arrived B. reached 选哪个,为什么
答
因为 arrive 是 不及物动词,可以单独用.而reach 则是及物动词,必须加地点才能用.