请用下列单词的适当形式填空。
restore fluctuate rival profit motivate investigate enlighten prejudice implement discard
 
1. We should not jump to conclusions. Let's______ first.
2. Can you ­­­______her on this subject?
3. The president will have to work hard to______ his credibility.
4. My mood seems to ______from day to day
5. Their decision was based on ignorance and______.
6. Reiner, 56, has all but conceded the race to his______.
7. This year the airline will be hard-pressed to make a______.
8. How do you ______people to work hard and efficiently?
9. Leadership is about the ability to ______change.
10. We should ______old beliefs.