在下面对话的空白处填上适当的话语（话语可能是句子，短语或单词），使对话完整
A: Your sister has moved to Shanghai, hasn’t she?
B: 1________________________, she has moved to Beijing.
A: 2_______________________________?
B: She’s been there since 2005.
A:3______________________________________?
B: About once a month. She wrote to me about a week ago.
A: I see. Are you going to write to her soon?
B: Soon? Look! 4_______________________________ now.
A: I think she’ll be very happy to receive your letter.
B: 5_______________________.