Tom was thinking about how to explain to the teacher why he was late for class, when a good idea _______him.
—Do you know ____ made him successful in his career? —Yes. His hard work and determination, of course.
With many cities in China dreadfully blanketed by thick haze, the environment problem is _____ Chinese people concern most nowadays.
—It is a mystery and a shock to all who knew him that he____ have taken his own life in this way. —What a pity, indeed.
_____, everyone present was amused by his adventure story in Africa.
_____ he is enthusiastic and qualified for the job, I see no reason to remove him from office.