补全对话 A：Hello,1____ B:This is Marry speaking.2____
A:Oh,Marry,this is Joan speaking.Can you hear me clearly?
B:Sure,3____?
A:I am standing on the Great Wall of China.
B:Really?
A:We are having a school trip and we are enjoying ourselves.
B:4____?
A:Yes,Betty is here now and Tony is also with us.
B:5____?
A:He is taking pictures for Betty and me.
(帮帮ME,谢啦）