he suddenly saw sue (across) the room he pushed his way (through) the crowd of people get to her
问题描述：
he suddenly saw sue (across) the room he pushed his way (through) the crowd of people get to her
为什么用across 为什么不能用over
为什么用through 为什么不能用across /into
答
across the room 在房间另一边 只能这么用
push through 相当于穿过人群 也是固定用法