—I am sorry I _________ my homework at home.

—That’s all right. Don’t forget _______ it to school this afternoon.

A．forgot; to take

B．forgot; to bring

C．left; to take

D．left; to bring

人站在地面上利用图所示的滑轮组向下用力将重物提起，请在图中画出省力的滑轮组的绕线情况．