Just imagine performing such an opera as Turandot inthe Forbidden City—there _____ be a better setting!

AlphaGo, an artificial intelligence machine outperformed Lee, which made the five-match score 4-1 ___________ AlphaGo.

at there are still some problems remaining______, we have to work extra hours tonight.

There is a computer _______ the desk.

________ how to do the homework, I went to ask my teacher for help.