用适当的单词完成对话。

A: What ___1___ this?

B: It's a ___2___ of my family.

A: Who (谁) is this girl?

B: She is ___3___ sister.

A: What's ___4___ name?

B: Her name is Emma.

A: Is that your father?

B: Yes, ___5___ is.

A: Oh, your family photo is very nice.

B: Thank you.

1._______2._______3._______4._______5._______

目前，公认的煤气利用比较好的软熔带形状分布为（）。

A.“V”型

B.倒“V”型

C.“W”型

D.倒“W”型