While _________, people sometimes can’t help buying something they don’t really need.
It is a good plan in theory, but it _____ to be seen whether it works in practice.
This piece of furniture is really inexpensive with a price of _____ forty dollars.
—Did you visit the museum today? —No. We _____ it, but we spent too much time shopping.
Oh, boy, why are you killing your time this way? Can’t you find something _____ doing?
I am going to do all I can _____ the bad impression you have of me.