in the meeting还是on the meeting

in the meeting 还是at the meeting in the meeting和 on the meeting的区别 应该是in the meeting 还是 at a meeting? In the meeting room ( ). 请问“On the conference”、“At the conference”、“In the meeting”、“ 是on the meeting还是at the meeting,那么assembly呢? He will speak__.A.at meeting B.in the meeting C.on the meeti join the meeting 还是join in the meeting?请问这两句话有什么区别? the meeting rooms are on the ground 【 the meeting is in the afternoon. Ask them____to the meeting on time tomorrow. _____will the meeting begin -In ten minutes .