[单选题]Guest: Oh, I hadn't realized how late it was. I'm afraid I'll have to be going. Host: Oh, not yet. I'm just going to make some coffee. Guest: ______ , though I'd really love to stay. I've got to be up by six tomorrow morning, unfortunately. Thank you for a wonderful party.

正确答案 ：A

I'm sorry, but I must

解析：解析：主人诚心挽留，客人坚持要走。由于不能接受主人的好意，客人应表示歉意，故而选择A．I'm sorry，but I must比较合理。其他选项使用场合不当。

[单选题]In Beijing there are ______ hotels with stars at present.

正确答案 ：C

about 400

解析：解析：本题的关键是找到这些选项中的数字在文中出现的地方，然后逐一对照确认即可。其依据句为“Beijing will have more than 800 hotels with star ratings before the Olympic Games in 2008. The city currently has 20 five-star hotels，34 four-star hotels and 338 other hotels with lower ratings.”可以看出，D选项内容是2008年的数字，A和B选项是五星和四星级宾馆的数字，而此题要求所有星级的宾馆总数。所以，答案是将不同星级宾馆数字相加，总数大约400(20+30+338)。

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