The idea of prohibiting fireworks first ________ in the 1980s, and the bans didn’t gain popular support until this year.
_______ in 1724, this business company is the oldest in my hometown.
This new type ______ camera is ______ high quality and is not expensive.
---I’m going to Vietnam?---How long ___ you___ in Vietnam?
I tried to persuade him not to keep in touch with her, but what I said was always ______.
The Great Wall is ______ tourist attraction that millions of people pour in every year.