Noboby__who_at the meeting tomorrow.(tell,speak)

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Noboby____who___at the meeting tomorrow.(tell,speak)

can tell,
will speak

Noboby__can tell__who__will_speak at the meeting tomorrow

can tell/will speak
tell：说
speak在这儿是演讲，即没人说是谁在明天的会上发表演讲

Noboby____who___at the meeting tomorrow.(tell,speak) T T “T “T T T^T T^T T T T^T T^T T^T T^T T T while(*t)t++; t--; T.....T.T.. 求大神救我!T^T T^T T^T 13-20t+4t*t*t-20t*t*t*t=0,求t?