【题目】When I arrived at the cinema，they told me they ______ all the tickets.What a pity!
A.have sold out
B.had sold out
C.would sell out
D.sell out

【答案】B
【解析】由题意可知，“票卖完”发生在“告诉”之前，故用过去完成时表示“过去的过去”；句意：当我到达电影院是，他们告诉我他们已售完所有的票。真是遗憾啦！。根据句意，故选B。