问题
单项选择题
Because this area has a high rate of crime and unemployment, there are only people moving out.
A．incentive
B．incident
C．incidence
D．initiative
答案
参考答案：C
解析：[分析] 词义辨析 rate几率，比率，速度，费用；而B．incident事件，事变；C．incidence发生，影响(方式)，影响范围，影响程度，发生率；initiative主动性；因此C为答案。