问题描述:
一道高中英语听力题!有材料.
HowmanypeopleareexpectedtosignuponFriday?
A.Atleast25BAtleast50C.Atleast75
材料M:ThereareonlyfiftypeoplesignedupforFriday'smeeting.
W:There'llbeatleasthalfthatmanysigninguponFriday,somakesurewehaveroomforseventy-five.
M:Oh,there'sroomforonehundred.Iwasworriedthattheroommightbetoolarge.
我觉得是C啊根据上下句也可以推测的吧。句子中There'llbeatleasthalfthatmanysigninguponFriday这句到底什么意思?