让人费解的英语题I---in London for many years,but I have never regret

让人费解的英语题I---in London for many years,but I have never regretted my final decision to move back to China. A;Iived B; was Iiving c; have Iived D;had Iived 请仔细解释各项的对或错的原因 My cousin went to Canada two years ago. He---there for a few months and then went to America.A;worked B;wouId work C;wouId be working D;has been working要求同上