---There must be a dozen pens in this house but I can never find one when I need one.--- Keep looking. ______ is sure to turn up.
Susan started to clean the room; __________Lily was preparing lunch.
----Why are your hands so dirty? ----I ____________in the garden.
---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?