John, look at the time,________you play the piano at such a late hour?
We were told to have our reading room_____ after school.
Only if you put your heart into your learning,_______.
The girl ______ in red is a friend of mine.
Mr Smith stood up in defence of the 16-year-old boy, saying that he was not the person ______.
---Do you know _______? ----Sorry, I’ve no idea.