— Isn’t it amazing that I met Francis at the Christmas party?—Really?For how many years ____ each other?
His parents wouldn’t let him marry anyone ______ family was poor.
The first thing ________ we should do is to master the basic grammar.
Diamond, _________, is the hardest of all materials.
He is not such a man ________ cares for himself only.
David was extremely excited at the good news that he would get a chance to the Rock Club to see the great man he admired ___________.