根据各句句意及汉语提示写出完整的英语单词(每空限填一词).
He's a nice boy. He always talks to others (礼貌地).
一Didn't you see the red light?
一Sorry,sir.I (check) the map and didn't notice it.
People are advised (keep) a distance of 6 feet or more in public places.
The world (not face) such a big challenge since World War II.
Come on!Go ahead,or you (regret) it for the rest of your life.
There are many places on the earth that are still (known) to humans.