Under the circumstances I usually think of the great effort and courage it _____ for the girl to come back and apologize.
I was advised to arrange for insurance(保险) _______ I needed medical treatment.
—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 .