They got two free tickets to Canada; otherwise, they'd never have been able to ______ to go there.
A:admit
B:avoid
C:appreciate
D:afford
(Ⅰ)求椭圆C的方程;
(Ⅱ)过点Q(﹣4,0)任作一动直线l交椭圆C于M,N两点,记 MQ→=λQN→ ,若在线段MN上取一点R,使得 MR→=−λRN→ ,则当直线l转动时,点R在某一定直线上运动,求该定直线的方程.
西亚地区最丰富、最重要的自然资源是( )