下列个体的产生是通过有性生殖形成的是（    ）

根据句意，用所给动词的适当形式填空。
(1)By the time he left college, he ____ (get) much working experience because of his part-time job.
(2)John, like other children who have no parents,____  (take) good care of in our country.
(3)We should wash hands properly ____  (fight) against H7N9 virus.
(4)Look! There are so many kites____ (fly) in the sky.
(5)If you want to improve your English, you should practice____ (speak) it as much as possible in and out of class.

Thank you 　　　 postcards from America.

朱志强说，无论任何时候都要积极向上。而且，将来有能力一定要回馈社会、帮助他人。他想感谢所有给予他帮助的人们，但最想感谢的是他的妈妈。十几年来，朱志强的妈妈周春莲坚持背儿子求学，她坚信读书对于双腿瘫痪的儿子更意味着自立的出路。如今，她选择继续陪读以方便照顾儿子上大学，妈妈的脊背依然是儿子最安全的港湾。

阅读材料，运用所学知识回答下列问题：