The young girl was _____ to ask such a simple question and nodded like the others.
It was not until he came back _____ he knew the police were looking for him.
It was ten o’clock _____ he came back home.
Was _____ that I saw last night at the concert?
It is _____ my father worked _____ I work now.
It is the protection for the trees _______ really matters, rather than how many trees are planted.