正确答案: A

I'm sorry, but I must

题目：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.

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。

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举一反三的答案和解析：

[单选题]Maggie ran back to the kitchen, eggs ______ carefully in her hands.

held

解析：解析：该句为独立主格结构，后半部分是eggs being held 的省略形式。

[单选题]Even if it ______ this afternoon, I will go there.

rains

解析：解析：主句如果是一般将来时，状语从句一般用一般现在时。

[单选题]

B． as C． and D． but 正确答案：D解析：本句话是一个转折关系，应该由but一词体现前后的对比关系。全句意思为：也许他们是胜利者，但他们肯定不是最文明的。

but

解析：解析：本句话是一个转折关系，应该由but一词体现前后的对比关系。全句意思为：也许他们是胜利者，但他们肯定不是最文明的。

[单选题]Which of the following objects was an important woodworking tool used by early American craftsmen?

A chisel

解析：解析：应该在文章中找到每一个选项的单词在文中出现的地方，然后判断出其是否是工具还是木雕作品。只有D选项chisel一词与另一种工具knife作为并列关系同时出现，所以可以判定其为另外一种工具。其他选项代表的全是木雕作品。

[单选题]Mrs. White's husband tried to ______.

stop her from buying unnecessary things

解析：解析：注意题干上的名词：Her husband在文章中出现的地方，从而可以很容易地找到本题地依据句“Her husband tried again and again to persuade her to give it up，but she just wouldn't listen.”本句话的主要意思为丈夫不让她为了中奖而购买不必要的东西，并不是不让她去商场。所以B选项错误；A和D选项内容在文中没有出现，属于无关信息。

[单选题]Mrs. White is different from her friends who were ______.

not always hopeful

解析：解析：本题题干上的信号词为different和friends，依据句为“Unlike her friends， however，she never lost heart.”其中lose heart =lose hope。此句意为“她从来都是满怀希望，而她的朋友与她不同，并不是经常满怀希望”。

[单选题]

B． talking C． saying D． mumbling 正确答案：C解析：此处需要一个及物动词。A和B后需要跟介词about，只有C正确。

saying

解析：解析：此处需要一个及物动词。A和B后需要跟介词about，只有C正确。

[单选题]Michael: The Johnsons are moving next week. We are going to have a going-away party for them Saturday. Tracy: I didn't realize they were moving so soon. ______ Michael: Yes, but we'll have one last chance to get together. We're planning a barbecue.

They are really going to be missed.

解析：解析：从Michael的对话but we'll have one last chance…可以推测上面Tracy的话里有遗憾的意思，因为前者话有转折，表示遗憾的事还有些弥补机会。故此选择C．They are really going to be missed．