单选题 She is an excellent teacher who has taught in four schools. ______ she taught, her principals had a high opinion of her.
【正确答案】 A
【答案解析】[解析] wherever“无论在哪”引导让步状语从句。句意：她是一位很优秀的教师，在四所学校教课，无论在哪里授课，校长对她的评价都很高。