listEning 5"AstronomyClAss"
{$mEDiAurl}
why DoEs thE proFEssor sAy this:
A、hE is trying to gEt thE stuDEnts to pAy AttEntion.
B、hE is CorrECting somEthing thAt hE sAiD EArliEr in thE lECturE.
C、hE is BEginning A summAry oF thE importAnt points.
D、hE is joking with thE stuDEnts ABout thE lECturE.