A:what; could to
B:everything; could
C:all; could
D:that; could to
在平面直角坐标系 xOy 中,直线 l 的参数方程为 {x=−2−3t,y=2−4t(t 为参数).它与曲线 C:(y−2)2−x2=1 交于 A、B 两点.
They have no paper_______.
— Really? ________.