视频对话：
I hear footsteps.
我听到脚步声了。
They're...They're in my bedroom.
他们……他们在我的卧室里。
本期学习词汇：
footstep
n.脚步（声）；足迹
例句：
1. In the sound of your faraway footstep, I'm a stranger loving you.
在你远去的脚步声中，我只是个爱你的陌生人。
2. I heard his footstep on the stairs.
我听到他踩在阶梯上的脚步声。
3. My father is extremely proud that I followed in his footsteps and became a doctor.
我的父亲非常自豪，因为我继承他的事业，成为了一名医生。