A valuable musical instrument was played recently in its first public performance (表演) since being r

4. C    5. D    6. B    7. A
【解析】
【分析】本文是一篇记叙文。文章讲述了一把乐器——斯特拉迪瓦里小提琴，它曾经被盗，失踪了35年。描写了它从诞生，被盗，重现以及被出售的经历。
【4题详解】
细节理解题。根据第一段“A valuable musical instrument was played recently in its first public performance (表演) since being rediscovered in 2015. The instrument, a Stradivarius violin, had been stolen and was missing for 35 years.”（近日，一件珍贵的乐器在2015年被重新发现后首次公开演出。这把乐器是一把斯特拉迪瓦里小提琴，曾经被盗，失踪了35年。）可知，这场表演的特别之处在于演奏这首曲子的是一把失而复得的珍贵小提琴。故选C项。
【5题详解】
细节理解题。根据第四段“Totenberg's three daughters all agreed that Mira Wang should perform with the Stradivarius. Amy Totenberg says the former student was close to her father.”（托滕伯格的三个女儿都同意Mira Wang应该和斯特拉迪瓦里一起表演。艾米·托滕伯格表示，这名前学生与她父亲关系密切。）可知，Mira Wang能有幸演奏小提琴是因为她和它的前主人，她的老师有密切的关系。故选D项。
【6题详解】
细节理解题。根据倒数第三段“Then, the former wife of the man who stole the instrument tried to sell it to a violin specialist who identified it. The former husband had once been a student of Totenberg.”（然后，偷琴人的前妻试图把它卖给一位鉴定出它的小提琴专家。她的前夫曾是托滕贝格的学生。）可知，偷琴人是托滕伯格的一个学生。故选B项。
【7题详解】
推理判断题。根据最后一段“The Totenberg sisters say they will sell the violin to a performer or a group. They want the instrument to be heard again by listeners around the world. Rare instruments also are musical treasures. In 2011, a Stradivarius violin was sold for more than $ 15 million.”（托滕伯格姐妹表示，她们将把小提琴卖给一个表演者或团体。他们希望世界各地的听众能再次听到这一乐器。稀有的乐器也是音乐的瑰宝。2011年，一把斯特拉迪瓦里小提琴以超过1500万美元的价格售出。）可猜测，这把琴它将易手。故选A项。