A man can fail many times, but he isn’t a failure____ he begins to blame someone else.
I’m sure you ______ to us just now, because we already know the truth.
I have many friends, __________some are businessmen。A of them B of whose C of which D of whom
He had been ill for a long time and _________ he was left behind in his work。
It was impossible to avoid _____ by his opinion。
With so many difficult problems ______, the newly-elected president, Obama, is to have a hard time。