John, look at the time. ______ you play the piano at such a late hour?
Most people usually have less money at the end of the month than ____at the beginning.
My cousin keeps the photo ____ he can see it every day, as it always reminds him of his college days in Florida.
These two countries are similar ____ they both have a high snowfall during winter.
We see the lightning ____ it happens, but we hear the thunder later.
I decided to pay a visit to my former teacher as soon as I ____.