73. The general asked his men to push _____ so they might overtake the retreating(败退的) enemy troop.
. Had you joined the caht room ten minutes ago, you would have known what we _______about then.
. .It is too bad for someone in such a high _______ in the government to behave badly in public.
. ----Why are your hands so dirty? ----I ____________in the garden.
. If I can help ____, I don’t like working late into the night.
. ---Why not open the windows to let _____cool air in? ---I’d rather you didn’t. ________air in out town is terribly polluted.