Subject：Who is to lead off the free debate.

　　迷你对话

　　A: Who is to lead off the free debate?

　　自由辩论由谁来带头发言?

　　B: I think our team leader ought to be Jack.

　　我想我们队应该是Jack吧。

　　地道表达

　　lead off

　　1. 解词释义

　　Lead off这个短语的意思是“开始”。

　　2. 拓展例句

　　e.g. Who is to lead off the discussion?

　　谁来带头讨论。

　　e.g. Who will lead off by asking the first question?

　　谁将开始问第一个问题?