词形转换。 1. vocabulary(复数) 2. learn(名词) 3. different(副词) 4. frustrate(形容词) 5. quick(副词) 6. fair(反义词) 7. solve(名词) 8. important(反义词) 9. agreement(反义词) 10. pronounce(名词) _________ _________ _________ _________ _________ _________ _________ _________ _________ _________