– Nobody but you _______ late for school this morning.

--Sorry , I _______ to school when it began to rain heavily.

A．was , went

B．were ,was going

C．was , was about to go

D．is, am going

美国南北战争中，一位在南方作战的将领要将一份重要情报送给总统林肯手中，他可采取哪种最先进的交通方式（  ）。

A．火车

B．汽车

C．马车

D．飞机