如图，已知AB是线段CD的垂直平分线，E是AB上的一点，如果EC=7cm，那么ED=______cm；如果∠ECD=60°，那么∠EDC=______度．

I don’t remember how many years ago _______I last showed you around the farm.

A．it was that

B．was it that

C．it was when

D．was it when