A. was in trouble to find. B. had trouble to find C. troubled in finding D. had trouble in finding
A. to go B. to leave C. leaving D. left
A. 3-6岁 B. 0-3岁 C. 3-7岁 D. 从胚胎形成开始至正式进入学校教育之前的儿童
A. 基础性 B. 公益性 C. 启蒙性 D. 盈利性
A. 学前家庭教育 B. 幼儿园教育 C. 托儿所教育 D. 学前班教育