根据对话内容，从方框内的选项中选出能填入空白处的最佳选项，其中有两个为多余选项。

(Rose and Ann are talking about chores.)

Rose: Ann, could you please get me some water?

Ann: Sure. ____ 

Rose: I'm sweeping the floor.

Ann: Do you like it?

Rose:  ____It's too boring, but I have to do it. How about you?

Ann: I hate sweeping the floor, too, but I like other chores. 

Rose: Really?____ 

Ann: I like to make the bed and water the flowers.

Rose:____   

Ann: Yes.____  And you?

Rose: I agree. I often help my mother do the dishes.

A. I think it's relaxing.

B. Do you like doing the dishes?

C. What do you want to do?

D. No, not really.

E. What are you doing now?

F. Yes, it's very interesting.

G. What chores do you like?

等腰三角形的一个外角是60°，则它的顶角的度数是 ____ °.