如图，在矩形ABCD中，E是AD边的中点，BE⊥AC，垂足为点F，连接DF，分析下列四个结论：

①△AEF∽△CAB；②CF=2AF；③DF=DC；④tan∠CAD= $\sqrt{2}$ ．

其中正确的结论有（  ）

1.John always does his homework____in order not to make any mistakes.
2.It's ____  to find any excuse when you do something wrong.
3.The factory makes a new type of cars which produces less air____.
4.All the victims were saved and taken to ____ .
5.We all know Mother’s Day is on the ____Sunday of May.            

如图为演示膈的运动与呼吸运动关系的教具，据图回答下列问题：