英语改错题！要快！今天出答案

How long have you worked abroad?
你去国外工作多久了？
Since 1949 he has been away from his hometown
自从1949年他就离开了家乡

改为 How often have you work abroad?
Since 1949 he has been away from his hometown.(leave 是结束性动词，不跟since)

How long have you worked abroad?
Since 1949 he has been away from his hometown.

同意2楼的第一个改法.第2个,应该该为in 1949 he has left his hometome

How often did you work aboard since 1949 he left his hometown?
此处应该用过去时，而不能用完成时，应为这表示的是过去的动作，完成时表示，动作未结束并有可能继续持续下去