阅读下面短文，掌握其大意，然后从各题所给的A、B、C和D项中，选出最佳选项。
When I first entered university, my aunt, who is an English professor, gave me a new English dictionary. I was 1to see that it was an English dictionary, also known as a monolingual dictionary.2it was a dictionary intended for non—native learners, none of my classmates had one, 3, to be honest, I found it extremely 4 to use at first. I would look up words in the dictionary and 5 not fully understand the meaning. I was used to the 6 bilingual dictionaries, in which the words are 7 both in English and Chinese. I really wondered why my aunt 8 to make things so difficult for me. Now, after studying English at university for three years, I 9 that monolingual dictionaries are 10 in learning a foreign language As I found out, there is 11 often no perfect equivalence(对应)between two 12 in two language. My aunt even goes so far as to 13 that a Chinese "equivalent" can never give you the 14 meaning of a word in English! 15, she insisted that I read the definition(定 义) of a world in a monolingual dictionary 16 I wanted to get a better understanding of its meaning. 17, I have come to see what she meant. Using a monolingual dictionary for learners has helped me in another important way. This dictionary uses a(n) 18 number of words, around 2, 000, in its definitions. When I read these definitions, I am 19 exposed to(接触)the basic words and learn how they are used to explain objects and ideas. 20 this, I can express myself more easily in English.
