Passengers are required to _____ seated until the plane comes to a complete stop.
–Did you go to the show last night? –Sorry. No boy and girl in the area_________invited
— When did you first meet Tom? — On May 2, ____, the first day I came to this city.
. The millions of calculations involved, had they been done by hand, _____ all practical value by the time they were finished.
_____ what he can do. He might get a job tomorrow. He might stay out of work for weeks.
Students shouldn’t be given so difficult a problem_________they cannot work out.