Fill In The Blanks

Question

I have Sharing for the first blank and Single for the second.

A _______ pair of valence electrons consitutes a _______ covalent bond.

Shared/Double.

See http://www.chemguide.co.uk/atoms/bonding/doublebonds.html

I would have gone with shared and single, also.
http://www.chemguide.co.uk/atoms/bonding/doublebonds.html

1,000*4,0000