题目

假设你是Bob，请你给你的笔友Mary寄一张你的全家福，并在信中向她介绍你的全家。词数60左右，信的开头和结尾已给出，不计入总词数，内容可适当发挥。Dear Mary,……Your friend,Bob 答案：Dear Mary, This is a photo of my family. There are four people in my family. They are my parents, my sister and me. The woman is my mother. Her name is Helen. She is a doctor. That is my father, David. He is a teacher. The girl is my sister. She is in a middle school. Her name is Lucy. She is very nice. Who's the boy? Yes, it's me! I love my family! Your friend, Bob甲、乙、丙、丁四位同学的运动衫上印上了不同的号码：赵说：“甲是2号，乙是3号．”钱说：“丙是4号，乙是2号．”孙说：“丁是2号，丙是3号．”李说：“丁是1号，乙是3号．”又知道赵、钱、孙、李每人都只说对了一半．请问：丙的号码是几号？