嘲笑处于困境中的人是不礼貌的.
those people is not polite.
Hainan is in the (南方)of China.
In autumn, quite a few (树叶) turn yellow and fall off the trees.
Computers were (发明) not long ago, but they are very useful for us.
So far, (千) of people have died of COVID﹣19.
Could I (借) your dictionary?