21. She was very __________ (happy) with the poor results of her exam.

22. His __________ (able) to solve complex problems amazed everyone.

23. The students showed __________ (obey) by following all the rules.

24. Her __________ (jealous) was obvious when she saw her friend with a new car.

25. He handled the situation __________ (care) and avoided any problems.

26. Their __________ (friend) has lasted for more than twenty years.

27. He __________ (nervous) waited for her turn to speak.

28. She achieved great __________ (achieve) in her career.

29. They had a long __________ (argue) about the best way to solve the problem.

30. __________ (polite) is important when dealing with customers