补全对话:(2)A:Excuse me,Mr Green,I can't _____the twins

find/lose/leave/

Excuse me,Mr Green.I can't find the twins.
Oh,we must find them. What are they wearing?
Well, Lucy is wearing blue trousers and a blouse.
A sweater?
NO,she isn't wearing a sweater.She's wearing a white blouse.
What about Lily? Is she wearing the same clothes?
No, she is wearing green trousers and a yellow sweater.
Right!Let's go and find them .

find,