far同义短语，how
同义词是how long，意思是多长，例如：
1、How long have you been living in this country?你在这个国家居住多久啦
2、How long can a human being go without sleep?人不睡觉能活多久
3、How long have you been in your present job?你干现在这工作多长时间了
同义词是how long，意思是多长，例如：
1、How long have you been living in this country?你在这个国家居住多久啦
2、How long can a human being go without sleep?人不睡觉能活多久
3、How long have you been in your present job?你干现在这工作多长时间了
