86.the days are short,___it is now December. a.because b.for c.goes d.want 請說說because for錶因為時的區別

86.the days are short,___it is now December. a.because b.for c.goes d.want 請說說because for錶因為時的區別

答案是:B
because表示必然的因果關係;for是對前面所說的事實進行補充說明.