如图,在△ABC中,点D、E、F分别是三条边上的点,EF∥AC,DF∥AB,∠B=45°,∠C=60°.则∠EFD=( )
A:80°
B:75°
C:70°
D:65°
解方程:x2﹣6x﹣5=0
My sister goes to school___ bike.