Frank , with his two sisters , _____ London by train which   _______  at 8:30 next morning .

A．is leaving for ; will leave

B．are leaving for ; leaves

C．is leaving for ; leaves

D．will leave for ; will leave

识记的内容遗忘最快发生在识记后的

A．第1天

B．第2天

C．第3天

D．第4天

E．第5天