海上某货轮在A处看灯塔B在货轮的北偏东75°，距离为12$\sqrt{3}$海里；在A处看灯塔C在货轮的北偏西30°，距离为8$\sqrt{3}$海里；货轮向正北由A处行驶到D处时看灯塔B在货轮的北偏东120°．（要画图）

（1）A处与D处之间的距离；

（2）灯塔C与D处之间的距离．

语法填空

Hotel Clerk: Hi, can I help you?

Man : Yes. I'd like a room ____ the night, please. The sign outside says you have vacancies(空房)

Hotel Clerk: Yes, ____ only a couple. I guess nobody wants to drive in such ____ (storm) weather.

Man : I surely don't. How much are the rooms?

Hotel Clerk:  They are ﹩50 a ____.

Man : That's fine.

Hotel Clerk: I can give you Room 14. It is right beside the coffee shop. I just need you ____ (sign) the register.

Man : There you go. I am ____ (awful)hungry, Is the coffee shop still open?

Hotel Clerk: Yes, it is ____ until nine o'clock. If you want anything after that, there are a couple of machines ____ (sell) soft drinks, chocolate bars, and so on.

Man : Thank you. By ____ way, is there a television in the room?

Hotel Clerk:Yes, we've got cable(光缆) TV.

Man : Oh, that's great.

Hotel Clerk:Well, here is your key. ____ you need anything else, please call me.

Man : Ok. Thanks again.