They no longer have to ______ large numbers of temporary workers to do the harvesting.
The small window in the wall could ______ some light into the room.
As we know, _______ medical examination will help us find out health problems as early as possible.
Some exercises appear to be ______ ones you have done, but on ______ second thoughts, you’ll find that they’re different.
---- Thank you for having bought me a ticket for the World Expo in Shanghai!---- ________.
_____you’ve grown up, you must stop this childish behavior.