第9题: [单项选择]A preschool teacher teaches the children ______. A. who are already in the first grade B. who have not yet begun school C. who have finished elementary school D. who are going to finish elementary school 参考答案:B 答案解析:[解析] 推理题。根据文中第二段得知:这些老师教的是三到五岁的孩子,为他们正式上学做准备.故本题答案为[B]。