Right. Now we all have some idea of various kinds of city transport. I'd like you to discuss this topic further and see if you can agree on which is the best type of transport for a big city like Beijing ( Shanghai , Nanjing …). During the discussion you may argue with each other or ask each other questions to clarify a point. You will have about four and a half minutes for the discussion. Your performance will be judged according to your contributions to the discussion.

[If one candidate talks too long]

Sorry, I'll have to stop you now. Let's listen to what [ C? ] has to say.

[If one candidate keeps silent for a long time] / [If the group is silent for some time, then ask one of the candidates to start the discussion.]

Now, [ C? ], could you please say something about your view of …?

[4.5 minutes later]

All right, that's the end of the discussion.