51. What does the passage say is of importance regarding genetic tests?
- A. Knowing their accuracy.
- B. Evaluating their applicability.
- C. Utilizing the information they provide.
- D. Weighing the consequences they have.
答案：A
答案句：With genetic testing becoming increasingly popular, many people are left wondering exactly how accurate it is. Whether you are taking a DNA test to build your extended DNA family tree, or want precise information on inborn( 先 天 的 )health conditions, it is important to understand how accurate genetic tests are, and what information we can rely upon.
参考译文：随着基因检测越来越流行，许多人都在想它到底有多准确。无论你是做DNA测试来建立扩展的DNA家谱，还是想要关于先天健康状况的精确信息，重要的是要了解基因检测有多准确，以及我们可以依赖哪些信息。
定位线索：题干“importance regarding genetic tests”→答案句“it is important to understand how accurate genetic tests are”；文中“understand how accurate”对应选项A“Knowing their accuracy”。
解析：题干问关于基因检测的重要性，答案句直接指出“it is important to understand how accurate genetic tests are”，即了解其准确性是重要的，与选项A“Knowing their accuracy”直接对应。选项B“评估适用性”、C“利用信息”、D“权衡后果”在原文中均未提及，属于无中生有。
53. What do we learn about genetic health tests from the passage?
- A. They are unable to identify certain hereditary diseases by themselves.
- B. They are generally unable to separate genetic and non-genetic factors.
- C. They cannot independently identify the majority of potential diseases.
- D. They cannot tell apart the impact of lifestyle and that of the environment.
答案：C
答案句：Genetic health tests claim to be able to detect certain hereditary( 遗 传 的 )diseases, or other health conditions. While certain rare diseases can be easily identified, most potential health conditions cannot be identified by genetic testing alone. The large majority of our traits and diseases also depend upon non-genetic factors, such as lifestyle, the environment, and many others.
参考译文：基因健康测试声称能够检测某些遗传性疾病或其他健康状况。虽然某些罕见疾病可以很容易被识别，但大多数潜在的健康状况不能仅通过基因检测来识别。我们的大多数特征和疾病还取决于非遗传因素，如生活方式、环境等。
定位线索：题干“genetic health tests”→答案句“most potential health conditions cannot be identified by genetic testing alone”；文中“most potential health conditions”对应选项C“the majority of potential diseases”；文中“cannot be identified by genetic testing alone”对应选项C“cannot independently identify”。
解析：题干问关于基因健康测试我们了解到什么，答案句指出“most potential health conditions cannot be identified by genetic testing alone”，即大多数潜在健康状况不能仅靠基因检测识别，与选项C“They cannot independently identify the majority of potential diseases”对应。选项A“无法识别某些遗传性疾病”与原文“certain rare diseases can be easily identified”矛盾；选项B“无法区分遗传和非遗传因素”和D“无法区分生活方式和环境的影响”在原文中未提及，属于无中生有。
55. What does the passage say about DNA tests to predict personality or talents?
- A. They are solid scientific bases for application.
- B. They are helpful in finding a romantic match.
- C. They do not look promising at the moment.
- D. They do not make any sense at present.
答案：D
答案句：Tests that offer to find your perfect romantic match and those claiming to predict personality or talents based on your DNA are pure nonsense. At the moment, the scientific bases for these applications are non-existent or incredibly weak.
参考译文：那些提供寻找完美浪漫伴侣的测试和那些声称根据你的DNA预测个性或才能的测试纯属无稽之谈。目前，这些应用的科学基础不存在或极其薄弱。
定位线索：题干“DNA tests to predict personality or talents”→答案句“those claiming to predict personality or talents based on your DNA are pure nonsense”；文中“pure nonsense”对应选项D“do not make any sense”。
解析：题干问关于预测个性或才能的DNA测试，答案句直接指出这些测试“are pure nonsense”，即纯属无稽之谈，与选项D“They do not make any sense at present”对应。选项A“有坚实的科学基础”与原文“scientific bases...non-existent or incredibly weak”矛盾；选项B“有助于寻找浪漫伴侣”与原文“pure nonsense”矛盾；选项C“目前看起来没有前景”虽然接近，但原文语气更强，“pure nonsense”表示完全无意义，选项D更准确。