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，其中有两个选项是多余的。

A. How do you do? B. Come here, please. C. Let me go and find them. D. Can I help you? E. What color of their clothes? F. Is she wearing the same clothes? G. But I can't find them.

A: Cathy!I want some help.

B: Yes, I'm coming. What are you doing?

A: I want to give these books to the twins.Do you know where they are?

B: There are many students over there.

A: Tina is wearing blue pants and a red sweater.

B: What about Gina?

A: No, she is wearing a white skirt and a yellow sweater.

B: I know.

A: Thank you. Tell them to come back.