Is your photo in the desk? ________.
The firemen soon ________ the big fire.
Mom, I’m old enough to wash ________ own clothes and ________. You can have a rest after work.
Do you know a spaceship flies at about nineteen kilometers ________ second?
— Morning, boys and girls! Please try your best in today’s exam! Good luck to all of you!— ________
—Sir, could you please put out your cigarette? This is a smoke-free (无烟的) school.—______