13 ._______, he is famous for writing blogs.
—How are you getting on with your business? —I'm glad to say it is ________.
—Did you look up the time of trains to Shanghai? —Yes, the early train is ________ to leave at 5:00 am.
—______ you got to know my telephone number?—Through a friend of yours.
Jack is good, kind, hard-working and intelligent. _____, I can't speak too highly of him.
It isn't so much whether he works hard; the question is whether he works _____.