There is a small group of English words which even some native speakers and writers find _____.
.----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.
..----Are my clothes too casual?----No. You can go ____you are.
.How ___ I help them to understand when they won’t listen to me?