When _______________ comes to saving energy, big changes start with small steps, like turning off the lights.
All but one____take part in the conference____tomorrow.
—— Is Tom still smoking ?—— No.By next Saturday he _______ for a whole month without smoking a single cigarette.
I should very much like to have gone to that party of theirs, but _____.
—— Sorry, I forget to post the letter for you.—— Never mind, _____ it myself tonight.
—— What were you up to when your parents came in?—— I_____for a while and_____some reading.