1. Are you checking out now?
你现在退房吗？
还能这样说：
Do you want to check out now?
Are you going to check out now?
应用解析：
blank check 空白支票，自由行动的权力；
draw a check 开一张支票；
put a check on sth. 制止某事
2. That makes a total of 660 dollars.
总共花了660美元。
还能这样说：
It costs 660 dollars in total.
It comes to 660 dollars in total.
应用解析：
It's dollars to doughnuts.
这是十分有把握的。
3. Your name and room number, please?
请问您的姓名和房间号码是什么？
还能这样说：
May I have your name and room number?
What are your name and room number?
应用解析：
a number of 若干，好多；
a high number 大数；
a low number 小数；
a back number 过期的刊物；过时的人物；落伍者
4. I'd like to check out.
我要退房。
还能这样说：
I want to check out.
I'd like to pay my bill.
谚语：
Murder will out.
谋杀案终必败露（纸包不住火）。