1．已知函数，若，则的所有可能值为(　　 )

A.1　　　　 　　　B.1或　　　　　 C.　　　　　 D. 1或

5.　　　 We are looking forward to your early reply

点评：

此文的长处在于：1. 在具体讲解前先给出范例，让学生对于标准的E-mail有直观感受。然后结合范例进行讲解，生动形象。2. 提供了大量的实用语料，对于学生的写作有很大帮助。3. 另外，练习形式多样，既有句子练习，也有融合在具体作文中的练习。4. 附加栏目新颖有趣，很能吸引学生的兴趣。

4.　　　 we’ re very angry about this and we hope that you can give us a satisfactory explanation

3.　　　 What was worse, when we asked a waitress to bring us a fork, she pretended not to have heard us

2.　　　 We reserved our seats in advance

1.　　　 I’m writing this letter to complain about the poor service of your restaurant

10. Attached are the photos taken at the party.

9. If you have any question concerning our product, please feel free to contact me.

8. I hope you can give me an opportunity for an interview after reading my resume.

7. I must stop now. Please give my best wishes to your family.