别担心- Don't worry.

捷足先登- The early bird catches the worm.

浅学误人- A little learning is a dangerous thing.

别误会我- Don't misunderstand me.

你做完了吗？- Have you finished？

晚饭我请客- Dinner is on me.

要我帮忙吗？- Do you need any help？

关于……人们有不同的观点- There are different opinions among people as to ____. Some people suggest that ____.

俗话说（常言道）- There is an old saying ______. It's the experience of our forefathers, however, it is correct in many cases even today.

现在，……，它们给我们的日常生活带来了许多危害- Today, ____, which have brought a lot of harms in our daily life. First, ____； Second, ____. What makes things worse is that ______.

就我个人而言，我相信……，因此，我坚信美好的未来正等着我们- Personally, I believe that ____, and therefore, I firmly believe that a bright future is waiting for us.

我不在乎- I don't care.

希望如此- Hope so.

不可能- No way!

过奖了- Don't flatter me.

我回来了- I'm home.

我不干了- I quit!

放手- Let go!

我也是- Me too.

天哪- My god!

来吧（赶快）- Come on.

等一等- Hold on.

我同意- I agree.

还不错- Not bad.

还没- Not yet.

再见- See you.

闭嘴- Shut up!

这些短句涵盖了日常生活、学习、情感表达等多个方面，适合高中生在英语学习和交流中使用。