1. (2020高二上·西城期末) When will the first speech begin?

Hi Susan, have you read the message about the conference on global warming next Friday?<br />Not yet. I've been busy the whole afternoon. Do you know the schedule?<br />The first speaker begins talking at 9 o'clock, followed by a tea break. The second session<br />begins at 10.30, and lunch will be served at 12.30.