题目

About ten years ago when I was an undergraduate in college. I was working as a practice student at my University's Museum of Natural History. One day while working at the cash register in the gift shop, I saw an elderly couple come in with a little girl in a wheelchair. As I looked closer at this girl, I saw that she was kind of set on her chair. I then realized she had no arms or legs, just a head, neck and main body. She was wearing a little white dress with red dots. As the couple wheeled her up to me, I was looking down at the register. I turned my head toward the girl and gave her a wink(△＋○＝20 △＝○＋○＋○＋○ △＝(　　) ○＝(　　)