His wife has left him, but he behaved _______ nothing had happened.

Is there anything about your high school life you wish you’d done differently? —- I regret that I ______ earlier what I really like doing

．How long is it ______ we last spent the holiday in the country together?

Edward, you play so wellBut I ________ you played the piano

What do you _______ Chai Jing’ documentary(纪录片)“Under the Dome”