As a journalist, Joan finds _______ worthwhile to spend time chatting with people of different backgrounds and nationalities.
---Jack was late for Mr. Smith’s oral class this morning. ---______? As far as I know, he never came late to class.
To everyone’s surprise, Michael claimed _____ all his homework in just one hour.
______ both sides accept these terms will everlasting peace be established in this region.
I could feel my heart beating violently ______ I went on the stage to sing a song.
Please make sure all the lights are ______ before you go to bed.