How can you step into the lab with your shoes on? You’re _______ to take them off before you enter it. I told you so!
She read the letter through before sending it, ______ for spelling mistakes.
“You’ve left the light on.” “Oh, so I have. _____ and turn it off.”
New technology ______ to make sure that the cars, taxis, buses and trains we use ______ the air.
The real test of ______ English is whether they can speak, read, write and orally understand good standard English.
—I’ve taken someone else’s green sweater by mistake. —It ______ Harry’s. He always wears green.