Why do you always drive to work _______ you could easily take the bus?
I’m trying to lose weight because I _______ my figure.
Some amazing people _______ our world for the better in the past 100 years.
_______ was a struggle for me to remember all the strange faces and new names.
Mountain climbing _______ be tiring and many people feel sick as the atmosphere gets thinner.
Now she is considering taking some weight-loss pills, _______ she thinks will help her become slim.