根据对话内容，将方框内符合对话语境的句子抄写在对话空白处，使对话恢复完整，选项中有两项是多余的。
A: Good morning, Mr. Wang.
B: Zhao Ziqing.         
A: I have been to America.
B: Great! Did you talk with Americans?
A: Yes, but only a few words. And I am not sure if they understood me.
B: No problem.        
A: But I made many mistakes when I spoke.
B: You should believe in yourself.       
A: I still worry about my oral English.
B:                Try to talk with others as much as you can.
A: OK.      

A．That’s a good excuse.

B．You have made a good start.

C．Many thanks, Mr. Wang.

D．Where have you been on vacation?

E.How long have you been there?
F.We all make progress from mistakes.
G.People are often friendly.