John seemed puzzled about _____ the question meant.
The pills really work! I __________ 7 kilograms in the last two months!
Now I regret ______ those weight-loss pills.
We also had different students in some classes, so ______was a struggle to remember all the faces.
Our club is much ___________ just music.
In 2004, he went to Oxford University __________ he became interested in Chinese culture.