We hurried to the station, ________ the train was gone.
Experts and teachers all think that failure is not _____ a bad thing to some extent.
Although Albert Einstein would someday be _________ famous scientist, he did not like __________ school.
—Shall we go out for a meal tonight? —__________. We haven’t been out for ages.
If you had told him the truth, he ______ so angry now.
Teaching is a difficult job ______ requires great skill and patience.