--Have the papers been corrected?--Yes, but I regret ______ that you failed it.--Well, now I regret ______ hard on it.
She is not fond of cooking,_______I.
Unfortunately,the careless accident_______him his life.
—Where can I find Martin?Dad is asking for him. —He_______in the backyard chopping wood.
All agree that the pollution now is not easy_______.
—Where are the visitors from? —_______from South Africa.