—I’m so sorry. —________here on time next time, or you'll be punished.
Yesterday my parents and I went to Tianyi Square, and we enjoyed _____ around there.
----- Your English is very good, who taught you?----- Nobody. I taught _____.
_____ he is ill, _____ he still goes to work.
-----_____ do you exercise?-----Once a week.
Which is _____, the sun or the moon?