Mary _____ her mother _____ the problem.
A:tell; off
B:tells; about
C:telling; for
德拉卖掉金发买来金表链,杰姆卖掉金表买来发梳,珍贵的礼物都成了无用的东西,真是“无巧不成书”,这样的巧合可信吗?