10. B
prudent: 审慎的，小心的，精明的。Sensible：明智的；合情理的。又如：Be sensible and take your umbrella. 聪明些把伞带上。Workable: 切实可行的。Possible：可能的。Feasible：可行的。That is a feasible scheme. 那是一个可行的方案。
11. D
renowned: 有名的；有声誉的。well-known：出名的，众所周知的。Remembered：被记住的。Recommended：被推荐的。Praised：被赞扬的。
12. A
sustain: 支撑，维持。 Maintain：维持；保持；使继续。又如：Ann and Mary maintained their friendship for the next thirty years. 安妮和玛丽在此后的三十年中一直保持着她们之间的友谊。Establish：建立；设立；创办。Our hospital was established in 1950. 我们的医院建于1950年。Acquire：取得，获得。Gradually we acquired experience in how to do the work. 我们逐步获得了做这工作的经验。Support：支持，拥护，赞成；资助。They supported the Democratic Party. 他们支持民主党。
13. D
tremble: 颤抖，发抖，打颤。Shake: 震动，颤抖，发抖。又如：He was shaking with anger. 他气得浑身发抖。Jump: 跳；跳跃。The horse jumped over the ditch. 马跳过了那条沟。Cry：哭。He cried over his wifes death. 他为妻子的去世而哭泣。Sway：摇动，摇摆。The branches are swaying gently in the wind. 树枝在风中轻轻摇曳。
14. C
upgrade: 使升级；提高；提升。Improve: 改进，改善；增进。又如：He put forward a plan for improving the rate of production. 他提出了一个提高生产率的计划。Renew: 使更新；使复原；使恢复。I came back from my holiday with renewed strength. 我度假回来，体力得到恢复。Increase: 增大；增加；增强。 Travel increases ones knowledge of the world. 旅游增进人对世界的了解。
15. D
weary: 疲倦的，疲劳的。Exhausted: 精疲力竭的。All three men were hot， dirty， and exhausted. 三个人都是又热、又脏且精疲力竭。Gloomy: 阴暗的；阴沉的。He came to see me in a gloomy winter day. 他在一个阴沉的冬日来看我。Ugly: 丑的，难看的。What an ugly building！ 多么难看的建筑物！ Silly: 愚蠢的；糊涂的。It was silly of me to say such a thing. 我说这话真傻。