词汇选项
For more than forty years before that outbreak，influenza had steadily ______ and was believed to be dying out.
A.enlarged
B.strengthened
C.decreased
D.increased
【正确答案】C
【答案解析】从上下文意思看，尤其是空白后面所说的“被认为正在消失”，因此此处只能是逐步“减少”的意思，绝不能是“扩大”、“加强”、“增加”等其他意思。
词汇选项
For more than forty years before that outbreak，influenza had steadily ______ and was believed to be dying out.
A.enlarged
B.strengthened
C.decreased
D.increased
【正确答案】C
【答案解析】从上下文意思看，尤其是空白后面所说的“被认为正在消失”，因此此处只能是逐步“减少”的意思，绝不能是“扩大”、“加强”、“增加”等其他意思。
