——What do you usually do at the weekend?——I ___ the program “If You Are The One” (非诚勿扰) with my family.
A:used to watch
B:was used to watching
C:get used to watching
D:am used to watch
①平面A′FG⊥平面ABC;
②BC∥平面A′DE;
③三棱锥A′﹣DEF的体积最大值为 164 a3;
④动点A′在平面ABC上的射影在线段AF上;
⑤二面角A′﹣DE﹣F大小的范围是0, π2 .
其中正确的命题是____(写出所有正确命题的编号)