单选题 Once the goal of the meeting has been established, you should prepare a list of important topics for discussion at the meeting.

【正确答案】 B

【答案解析】本题的关键在于理解Once的意思。本句主干为you should prepare a list。Once引导的时间状语从句可译为“一旦……就”。of important topics为后置定语修饰list。for discussion at the meeting为目的状语。