— Ann is in hospital.
— Oh, really? I ________ know. I ________ go and visit her.
A:didn't; would
B:don't; would
C:don't; will
D:didn't; will
(Ⅰ)写出曲线C的直角坐标方程和直线l的普通方程.
(Ⅱ)若P(3, 5 ),直线l与曲线C相交于M,N两点,求|PM|+|PN|的值.