补全对话 （5小题，每小题2分，共10分）
A: Hello, Xiaoming . ______________________________？
B: I’ m sending an e—mail to one of my good friends .
A:You are great ! But __________________________________.Could you please teach me how to do it ?
B: Certainly ! _______________________. Well , I have finished sending it .
A:Is it easy to send an e—mail ?
B: ____________. Please look at me . I will show you how to do it . First , _____________________________. You can see a picture of a letter on the screen . Click on that , a box will appear -----
A: Thank you .
B: My pleasure .