阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

If you have learned some maths at school, you can quite quickly work out that one eleventh is about nine percent. However, do you know that nine percent is also the number of children 【小题1】 are not at school? That's right—one in eleven children is not 【小题2】 (study) and probably even cannot do the simple maths you just did very 【小题3】 (easy). They drop out of school because their 【小题4】 (family) are too poor and they have to work like adults. In 2013, millions of children and teenagers 【小题5】 (be) out of school. Most live in poor countries, 【小题6】 there are also some boys and girls unable to go to school in rich countries. If you are lucky enough 【小题7】 (go) to a senior high school, you should be grateful 【小题8】 the opportunity. So the next time you feel like you do not want to do 【小题9】 (bore), difficult homework or go to class, think about the unlucky children. They don't have the chance to get a school 【小题10】 (educate). Make the most of what you have learned and make the world a better place.