1. If you do the same thing over and over again, you begin to do it _________ (automatic).
2. The Impressionist paintings were __________ (有争议的) at the time they were created.
3. The teacher gave __________ (具体的) examples to show the meaning of these abstract words.
4. A teacher should not show __________ (prefer) for any one of his pupils and should treat them fairly.
5. _________ (civil) there will be destroyed if war breaks out.