单选题 1.   The manager entered the office and was happy to learn that four-fifths of the tickets were booked.
【正确答案】 D
【答案解析】 应改为had been booked。本题考查动词时态。根据句意可知,“票被预订”发生在“经理很开心”之前,即发生在“过去的过去”,所以应用过去完成时。
   这位经理走进办公室,听到五分之四的票都被预订的消息很开心。