C．comments D．acquires

　　解析：选B　leave意为"离开"；convey意为"表达；传达"；comment意为"发表评论；发表意见"；acquire意为"获得；取得"。根据句意可知，此处表示该组织向人们传达的信息是"凭自己的本领去生活，要有说'不'的意志"，convey the message意为"传递/表达信息"，符合语境。

　　18．A.will B．chance

　　C．fact D．pride

　　解析：选A　will意为"意志力"；chance意为"机会"；fact意为"事实"；pride意为"自豪"。根据第17题的解析可知此处应该是：告诉人们自己要有对错误说"不"的意志力(will)。

　　19．A.promises B．requests

　　C．successes D．dreams

　　解析：选D　句意：所以，不要为了别人的梦想而活着。promise意为"允诺；承诺"；request意为"请求；需要"；success意为"成功"；dream意为"梦想；愿望"。根据第一段的描述可知：Emily周围的人都希望她成为一名兽医，但是通过自己这些年的拼搏和思考终于明白了--不能为了别人的梦想活着，故D项符合语境。

　　20．A.smiles B．reasons

　　C．choices D．mistakes

　　解析：选C　句意：假如你的选择仅限于似乎可能或合理的范围内，你将远离自己的真心。smile意为"微笑"；reason意为"原因"；choice意为"选择"；mistake意为"错误"。根据语义可知C项正确。

　　Ⅱ.阅读理解

　　We can find robots everywhere. Robots build cars, play chess and can clean your house. They may drive your car in the near future. Two robots, named Spirit and Opportunity, were sent to Mars on a mission (任务) to explore the red planet. Robots also help people in natural disasters. They are used in search and rescue operations following an earthquake or a nuclear accident.

In most cases, robots are sent to places considered to be unsafe. The problem is that all of those types of situations are extremely unpredictable and unfriendly. And it is very likely that