1.comfortable adj. 轻松自在的，舒适的
scare/frighten out of one's wits 胆都吓破了，吓呆了(to frighten a person so much that he does not know what he is doing)
例句：I was hiding myself behind the door, and the deafening shots scared me out of my wits.
2.knock vi./vt. 敲，打；碰撞
knock oneself out on something 在...上花大功夫，下大力气
例句：Gloria has been knocking herself out on that project.
3.let out 放出，让…走
例句：1.I couldn't listen to the president's television speech last night because my political science lecture let out too late.
2.A:I assumed you'd be in class till three o'clock today.
B:I usually am. Professor Smith let out early.
3.Prof.Webster always lets us out late．
4.put on 戴上，播放；穿上；上演
例句：1.I think I'll put on some music now．
2.A:Prof.Nelson, could you please turn up the temperature in here? I'm having trouble concentrating.
B:Yeah, I understand. But I don't control the thermostat. Tell you what, I'll talk to maintenance about it after class. In the meantime, I suggest you put on a sweater if you've brought one．
3.The drama club puts on a play once every other month.
5.try on 试穿(a garment, shoes, etc.)
例句：1.I wish I had tried these shoes on to see if they fit.
2.The coat you tried on was really nice, and reasonably priced.