Oath： a formal and very serious promise

　　Promise： to tell someone that you will definitely do or provide something or that something will happen

　　30. The suspect was accused of （preventing， withholding） some important evidence from the court.

　　Prevent： to stop something from happening， or stop someone from doing something

　　Withhold： to refuse to give someone something（隐瞒）

　　31. Whether or not he is the best person for the promotion is （debatable， arguable）。

　　Debatable： things that are debatable are not certain because people have different opinions about them

　　Arguable： not certain， or not definitely true or correct， and therefore easy to doubt

　　32. He has established himself as a （credible， believable） businessman.

　　Credible： deserving or able to be believed or trusted（可形容人或事）

　　Believable： something that is believable can be believed because it seems possible， likely， or real（只能形容事）

　　33. His story of having discovered the treasure buried by some pirates seemed （incredible， incredulous） to everyone

　　Incredible： too strange to be believed or very difficult to believe

　　Incredulous： unable or unwilling to believe something

　　34. “But the piano is out of （tone， tune）”， she said in a disappointed （tone， tune）。

　　Tone： the way your voice sounds， which shows how you are feeling or what you mean

　　Tune： a series of musical notes that are played or sung and are nice to listen to

　　35. Her friends expressed great （sympathy， empathy） to her when her mother died.

　　Sympathy： the feeling of being sorry for someone who is in a bad situation（表具体）

　　Empathy： the ability to understand other people's feelings and problems（表抽象）

　　36. They are now enjoying a short （vocation， vacation） at the seashore.

　　Vocation： the feeling that the purpose of your life is to do a particular type of work， especially because it allows you to help other people（尤指一种能够帮助他人的职业，比如说教师等）

　　Vacation： a holiday， or time spent not working