题目

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 答案：C以下说法正确的是（ ）A．常温下，金属都是固体B．钠比铝的抗腐蚀能力强C．青铜、生铁、焊锡均属合金D．木炭和ZnO在高温条件下不能反应