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_______________________.

下图位于冰岛南部的艾雅法拉火山于2011年4月14日喷发，火山灰在7000～10000米的高空形成了火山灰云团。读图回答下题。

下列关于冰岛火山喷发的叙述，正确的是（）

A．火山位于亚欧板块和美洲板块的消亡边界上

B．造成北极地区冰盖大面积融化，形成洪水

C．将增强大气的吸收作用，加剧全球气候变暖

D．火山喷发后当地昼夜温差变小