（ ）It's meaningful _______children_______charity work at a young age.A.of; to join in B.for;to join in C.of;joining D.for;to join

（ ）It's meaningful _______children_______charity work at a young age.A.of; to join in B.for;to join in C.of;joining D.for;to join
（ ）It's meaningful _______children_______charity work at a young age.
A.of; to join in B.for;to join in C.of;joining D.for;to join

（ ）It's meaningful _______children_______charity work at a young age.A.of; to join in B.for;to join in C.of;joining D.for;to join
正确答案为：
D for to join
对于孩子们来说,年轻时参与到慈善工作中去很有意义.

D
固定用法：it's adj. for sb to do sth
join +组织
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D
固定用法：it's adj. for sb to do sth
join +组织
*****************************************************************************
祝天天开心，学习进步！本题不明白，请再问；
如果对你有所帮助，请点击本页面中的“选为满意回答”按钮,谢谢！
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选择A, 如果用for,后面就必须是joining