根据对话内容，从方框中选择恰当的句子完成对话，使其完整、通顺。选项中其中有一项为多余。
A．How about you? B．OK，great，see you! C．Thank you，Alan． D．Where is it? E．When is your birthday? F. When is it? |
A：Hi．Betty．Happy birthday!
B：____
A：So,how old are you?
B：I’m twelve．____
A：I’m thirteen．
B：____
A：My birthday is in September．
B：Well,do you want to come to my birthday party?
A：Oh，yes. ____
B：At three this afternoon．
A：____
