Which of the following sentences is INCORRECT？A．I told him this morning that I should be t

Which of the following sentences is INCORRECT？

A．I told him this morning that I should be twenty tomorrow.

B．My mother just asked me where I had been.

C．Formerly people did not know the earth moves.

D．She said that he was sleeping in her room.

请帮忙给出正确答案和分析，谢谢！