第5题: [单项选择]After several nuclear disasters, a ______ has raged over the safety of nuclear energy. A. quarrel B. suspicion C. verdict D. controversy 参考答案:D 答案解析:[解析] 本题空格处是说展开了一场关于核能源安全性的辩论。D项controversy“争论,辩论,论战”符合题意,如:give rise to much controversy(引起许多争论)。其他二