2. A. but　　　　 B. and　　　　　　 C. if　　　　　　　 D. unless

1. A. knowing B. wondering　 C. earning　　　　　　 D. hearing

15. B。“It be + 形+for sb. + to do” 表示对某人来说做某事怎样(简单、困难、重要……)而of sb.表示人的性格或品质，如kind, bad, nice 等。

51

Many of you are studying English and you may be 　1　 　why it is so difficult to learn. It's actually not too difficult to learn 　2　 　you know some 　3　 　about the language and culture that it reflects (反映). Perhaps the first thing you need to know about English is that it is made up of several other languages 　4　 　French, German, Latin, Greek and AngloSaxon. In addition, there are words 　5　 　Spanish in English and many American Indian words and names, even some Chinese and Japanese 　6　 　can be found in the English language. This borrowing of words 　7　 　other languages is 　8　 　of the key reasons 　9　 　some of the difficulties that people meet with (遇到) 　10　 　they are learning English.

14. B。根据整篇文章的观点就可得知人类才是动物真正的敌人。

13. C。狗叫声通常用barking。

12. A。表示长得和鹿差不多高。

11. C。with引导的介宾短语常常用来表示人或物的外貌特征。

10. D。There be sb./sth.+ doing 为固定搭配。

9. B。besides 表示“除了……还有……”，而except“除……之外”。故选except表示除了动物园其它地方就没有动物了。

8. B。跟上一句表达同样的意思。