At first Bob was puzzled by Virginia s waving, but then it _____ his mind that she was trying to tell him something.
Bears often hide themselves in places _______ can’t be found by hunters.
The most popular food ______ on menus in western countries is hamburger.
The girl’s years of hard training _______ when she finally won the first prize.
As a father of three children, I need a job ______ so that we can survive.
In China’s countryside, villagers often have the same family name, but _______ not be closely related.