作此决定并非偶然,对此我已思虑多时。
The decision and I'd thought about it for long.
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.
The little girl dreamt of becoming a good ballet (dance).