There are about ______ people in the park on National Day.
_____ food is stored deep in the tunnel for the use of war.
____ she couldn’t understand was _____ fewer and fewer students showed interest in her lessons.
She looks forward every spring to ____ the flower-lined garden.
It is not socially ______ for parents to leave children unattended at that age.
The best way to deal with complex problems is to _______ them _____ into smaller problems.