10. B
prudent: 審慎的，小心的，精明的。Sensible：明智的；合情理的。又如：Be sensible and take your umbrella. 聰明些把傘帶上。Workable: 切實可行的。Possible：可能的。Feasible：可行的。That is a feasible scheme. 那是一個可行的方案。
11. D
renowned: 有名的；有聲譽的。well-known：出名的，眾所周知的。Remembered：被記住的。Recommended：被推薦的。Praised：被贊揚的。
12. A
sustain: 支撐，維持。 Maintain：維持；保持；使繼續(xù)。又如：Ann and Mary maintained their friendship for the next thirty years. 安妮和瑪麗在此后的三十年中一直保持著她們之間的友誼。Establish：建立；設立；創(chuàng)辦。Our hospital was established in 1950. 我們的醫(yī)院建于1950年。Acquire：取得，獲得。Gradually we acquired experience in how to do the work. 我們逐步獲得了做這工作的經驗。Support：支持，擁護，贊成；資助。They supported the Democratic Party. 他們支持民主黨。
13. D
tremble: 顫抖，發(fā)抖，打顫。Shake: 震動，顫抖，發(fā)抖。又如：He was shaking with anger. 他氣得渾身發(fā)抖。Jump: 跳；跳躍。The horse jumped over the ditch. 馬跳過了那條溝。Cry：哭。He cried over his wifes death. 他為妻子的去世而哭泣。Sway：搖動，搖擺。The branches are swaying gently in the wind. 樹枝在風中輕輕搖曳。
14. C
upgrade: 使升級；提高；提升。Improve: 改進，改善；增進。又如：He put forward a plan for improving the rate of production. 他提出了一個提高生產率的計劃。Renew: 使更新；使復原；使恢復。I came back from my holiday with renewed strength. 我度假回來，體力得到恢復。Increase: 增大；增加；增強。 Travel increases ones knowledge of the world. 旅游增進人對世界的了解。
15. D
weary: 疲倦的，疲勞的。Exhausted: 精疲力竭的。All three men were hot， dirty， and exhausted. 三個人都是又熱、又臟且精疲力竭。Gloomy: 陰暗的；陰沉的。He came to see me in a gloomy winter day. 他在一個陰沉的冬日來看我。Ugly: 丑的，難看的。What an ugly building！ 多么難看的建筑物！ Silly: 愚蠢的；糊涂的。It was silly of me to say such a thing. 我說這話真傻。