语法与词汇
14.However, at times this balance in nature is______, resulting in a number of possibly unforeseen effects.
【正确答案】
B
【答案解析】A项troubled意为“麻烦，困扰，打扰”；B项disturbed意为“打扰，打乱，打破”；C项confused意为“困惑，迷惑不解”；D项puzzled意为“迷惑，窘困”。根据句子主语部分this balance in nature(大自然的这种平衡)提示，应选B项。