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: 1No , she has moved to Beijing.
A: 2How long has she been there ?
B: She’s been there since 2005.
A:3How often does she write to you ?
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! 4I’m writing to her now.
A: I think she’ll be very happy to receive your letter.
B: 5I think so/ Sure .
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解析：此题重点考察情景对话的对话规则。