Great changes _________ in Tongren in the past five years.

　 A. have happened　　　　　 B. have taken place　　　　

C. have been happened　　　　 D. have been taken place

-- Are you going to the party?

-- No, because I ______.

　　 A. have asked　　　　 B. haven't asked

　　 C. have been asked　 D. haven't been asked

假如你叫扬帆。毕业在即，为表达你的感激之情，你饱含深情地为你的英语老师写了一封信，请完成下面这封信，每空一词。

Dear Miss Liu,

　　　 As you know, I’ve made great progress in English 1　　　 to your help. At this moment ,I want to say “Thank you”.

　　　 I still remember when I began to learn English, I ．　　 2　　　 it too difficult .No matter how hard I tried, I still couldn’t do well in it .I lost my confidence and almost gave it up. As soon as you knew it, you had a long talk with me kindly about 3　　 to learn English well .You always encouraged me whenever I made a little progress. Ever since then I have been 4　　 in it and improved myself a lot. Though I have to say goodbye to you soon ,I still think I am so lucky to be your student .I hope you can relax yourself and keep 5　 .

Yours,

Yang Fan