单选题 How did Yu reach her goal? [A] By teaching herself. [B] By working as a personal teacher. [C] By finishing all the courses for high school students.

【正确答案】 A

【答案解析】[解析] 于同学的目标是当一名老师，所以她开始自学(To reach her goal to be a teacher，she began to teach himself．)。最终完成了所有中学的课程，甚至也学了些大学的课程，后来作了私人教师，所以应该选 [A]。