直到所有的病人都得到了治疗,医生才离开他的办公室。
A.The doctor left his office till all the patients had been treated. B.The doctor did leave his office till all the patients treated. C.The doctor did not leave his office till all the patients had been treated.正确答案C
直到所有的病人都得到了治疗,医生才离开他的办公室。
A.The doctor left his office till all the patients had been treated. B.The doctor did leave his office till all the patients treated. C.The doctor did not leave his office till all the patients had been treated.正确答案C
