.The old man came——to the railway smtion,only the train was slowly pulling out of the station.
It__________ long before we __________the result of the experiment.
If you __________ attend the party , you'd better leave now.
I don't know whether my sister will come or not, but if she __________ , __________.
Food supplies in the flood-stricken area __________. We must act immediately before there's none left.
Stand over there __________ you'll be able to see the oil painting better.