补全对话。

A: Good afternoon, Miller!      l     

B：I'm drawing a horse.

A:A horse? Can you let me have a look?

B:     2      . Here you are.

A: Oh, the horse looks very nice. Do you often draw in your free time?

B:     3      .

A: Do you like drawing?

B: Yes.  I like drawing very much.

A:     4     ?

B: Because it's very interesting. And my art teacher is very kind to me.

A:     5      ?

B: I have an art lesson once a week.

土壤的渗吸速度与哪几种因素有关？