_______ has recently been done to provide more buses for the people, a shortage of public vehicles remains a serious problem.
—We’re supposed to be there at 6:00?—_______ I know.
I thought things would get better, but _____it is they are getting worse.
Although he knew little about the large amount of work done in the field , he succeeded ____other more well-informed experimenters failed.
John waited at the bus-stop for nearly half an hour _____ the bus finally arrived .
Not that I’m unwilling to lend you a hand , ____I’m too busy for the moment .