3. The cause of Mozart's demise is a long-standing medical ______. Over the years, physicians have suggested more than 100 possibilities, including poisoning, malnutrition, kidney disease, and heart failure.
A.mystery
B.contest
C.controversy
D.trial
A B C D
A
[解析] 莫扎特的死因是一个存在已久的医学之谜。多年来,医生们提出了一百多种可能性,包括中毒、营养不良、肾脏疾病和心脏衰竭。 选项A为“秘密,谜,神秘,神秘的事物”;选项B为“争论,争执”;选项C为“公开辩论,论战”;选项D为“试验,审讯,审判”。由后半句中提供的信息,“莫扎特的死亡有一百多种可能性(physicians have suggested more than 100 possibilities)”,可以判断莫扎特之死是一个“不解之谜”,故选A。
4. The explosion and the oil spill below the surface of the Gulf of Mexico left my mind in such a ______ that I couldn't get to sleep.
5. The goal of this training program is to raise children with a sense of responsibility and necessary courage to be willing to take on challenges in life.
6. Differences among believers are common; however, it was the pressure of religious persecution that exacerbated their conflicts and created the split of the union.