SOS!!!!!Do you think the above sentences are correct?State your opinion.

1.正确。their用于和everyone，everybody搭配，是作为中性（他、她）代词，意思也是指每一个人，这一用法已延续很长时间。
2.语法上来说没有错误，过去被认为是正确的，但现在时代变了，女性也撑起了半边天，这里说的是每个人，但后面的搭配却只有男性代词his，让半边天情何以堪？
3.正确，但其实这是读出来时的句子，如果写作Everybody has his/her worry更准确。

1，Their is correct here. The use of their as a singular neuter pronoun has been valid for hundreds of years.
2，Originally, one would say "Everybody has his worry", because "his" would refer to both men and women. However, as women's rights activists became more vocal, it was deemed improper to use the masculine form to describe men and women.
3，Correct. It would be more correct to say "Everybody has his/her worry."

你最好避免用这种用法。理论上最后一个是对的，但是，但是，但是你不觉得拗口吗？

口语上很多人会用第一句，但是语法其实是不对的。

不如说：People all have their own worries.