题目

根据下面的对话内容，选出最佳答案，使对话完整、通顺。选项中有一项为多余选项。A：Excuse me. I want to join a club.B：OK. We have the Art Club, the Music Club, the Chess Club, the English Club and the Sports Club. 【1】A：I really don't know.B．【2】A：No, I don't like them.B：【3】A：Yes. I can play it very well. I want to learn some new things.B：【4】A：Yes, I do. I want to have more friends, and I want to learn English well.B：OK. 【5】You will know new friends and learn more English knowledge(知识). A.Do you want to have new friends如图，△ABC绕顶点A顺时针旋转，若∠B=30°，∠C=40°，问：①顺时针旋转多少度时，旋转后的△A′B′C′的顶点B'与原三角形的顶点C和A在同一直线上？②再继续旋转多少度时，C、A、C′在同一直线上？（原△ABC是指开始位置）