根据对话填写数字。

A: Hello, Amy. How many apples are there on the table?

B: Twelve. Hi, Sarah. How many flowers are there?

A: Twenty. I have six oranges. How many ants are there on the floor?

B: Wow! There are thirty.

1.  _______________

2.  _______________

3.  _______________

4.  _______________

成熟的房地产企业只有真正呈现以下图示营销组织的情况才有一个真正的基础（）。

A.A

B.B

C.C

D.D