"Mary, turn off the water_________you are brushing your teeth. " "Sorry, I'll do it at once. "A. until B. while C. during
My parents want me _______a writer.
Which do you like ______, apples or oranges?
—How many birds can you see in the trees? —I can see _____ birds in them.
Although he is very old, ______ he works very hard.
Don’t worry. Your mother will look after your baby ___________.