[解析]
(1)C.推理判断题。根据第一段中There is also evidence that anxiety can increase the attention you pay to relevant information.(还有证据表明,焦虑会增加你对相关信息的注意力)可知,焦虑能让我们更专注。故选C.
(2)A.细节理解题。根据第三段句子At least two published studies have identified that people who score higher on measures of anxiety also tend to perform better on intelligence tests.至少有两项已发表的研究表明,在焦虑测试中得分较高的人在智力测试中也表现得更好。可见偶尔感到焦虑是智力的一种表现。故选A.
(3)A.推理判断题。根据第四段第一句The important thing,if you are a worrywart,is not to let your fear destroy your dreams.And don't bury your head in the sand. (如果你是个杞人忧天的人,最重要的是不要让恐惧摧毁你的梦想。不要逃避现实)可知,作者认为,我们应该避免被焦虑打败。故选A.
(4)D.主旨大意题。根据第一段中It is a mistake to think that we'd make better decisions if only we keep our feelings under control.Instead,a mix of feelings like anxiety and logical(合逻辑的) thinking leads to sound decision﹣ making.(认为只要我们控制住自己的情绪,就能做出更好的决定,这种想法是错误的。相反,焦虑和逻辑思维的混合会导致合理的决策)以及第二段Recent studies have shown that people who are anxious about their relationship (for example,they fear to be abandoned) tend to be better at recognizing people who tell lies and are more likely to raise the alarm when danger is present.(最近的研究表明,那些对他们的关系感到焦虑的人,例如,他们害怕被抛弃,往往更善于识别说谎的人,而且在危险出现时更有可能发出警报)可知,这篇文章的主题是焦虑带来的意想不到的好处。故选D.