It’s one thing to have theories, but it’s _______to put them into practice.
----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?
In summer, food will go bad if________in room temperature.