以意外伤害而致身故或残疾为给付保险金条件的人身保险称为______。
A．人寿保险 B．人身意外伤害保险C．健康保险 D．工伤保险
参考答案：B
______ the worker’s working efficiency, the manager will allow him to have a coffee break.
A．Improving
B．To improve
C．Having improved
D．Improved
