答案应该是joining
如果用joined,应为before he joined the ...
before后接动词ing形式,表示主动.相当于before he joined teh film industry.
译文:
加入电影业前,他是个著名的医生.
答案应该是joining
如果用joined,应为before he joined the ...
before后接动词ing形式,表示主动.相当于before he joined teh film industry.
译文:
加入电影业前,他是个著名的医生.