Sociable: of people 人 enjoying spending time with other people 好交際的;合群的;友好的
She's a sociable child who'll talk to anyone.
她是個合群的孩子，跟誰都有話說.
I'm not feeling very sociable this evening.
今晚我不大想跟人應酬.
We had a very sociable weekend(= we did a lot of things with other people).
我們大伙過了一個十分熱鬧的周末.

Upbeat: positive and enthusiastic; making you feel that the future will be good 樂觀的;快樂的;積極向上的
The tone of the speech was upbeat.
這次講話的語氣頗為樂觀.
The presentation ended on an upbeat note.
展示簡報以樂觀的語調結束.

Venerable: venerable people or things deserve respect because they are old, important, wise, etc. (因年高、顯要、智慧等)令人尊重的,值得敬重的,受敬佩的 formal
a venerable old man
德高望重的老人
a venerable institution/tradition
令人仰慕的機構;備受推崇的傳統

來源:可可英語 http://www.ccdyzl.cn/kouyu/200912/92853.shtml