Oh, it’s you, I’m sorry I ____know you ____here

Should the present unemployment continue,the society________a more troublesome situation.

下列各句中加横线词语的使用，不正确的一项是（ ）

efore I left London, _____ I sent hima telegram.

s a _____ in our office that when it’ssomebody’s birthday, they bring in a cake for us all to share