Children who are over-protected by their parents may become _____.
--- Go for hiking this Saturday, OK ? --- ____ . I like getting close to nature.
Eating too much fat can ______ heart disease and cause high blood prssure.
_____into the house, the thief was soon caught by the police.
In such a fierce competition, a person has to make every effort if he ______.
Only when ______ possible to settle the problem.