Supply the correct word form.
1. She's always worried about the _________ of her family. ( safe )
2. Don't leave the light on . It wastes __________ . ( electric)
3. Most teenagers like taking part in _________ service . ( communal )
4. This river is very __________ for swimmers . ( danger )
5. The ____________ of atom bomb is very terrible . ( destroy )
6. Hard work always brings ___________ . (succeed )
7. Those clothes are __________ for cold weather . ( suit )
8. You must put all medicines in __________ cupboards . ( lock )