In one year she turned from a problem child into a model student.
一年内，她从问题儿童变成了模范学生。
Tommy, an only child, had always been happy, cooperative and an excellent student.
汤米是个独子，一直生活幸福，乐意合作，而且是个出色的学童。
Second, it will be better if the child is a primary school student.
第二，如果他是个小学生就更好了。
Second, it will be better if the child is a primary school student.
第二，如果他是个小学生就更好了。
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