By the time California to become the 31th federal state of the USA in 1850, it was already a multicultural society.
Onlywhenonelosesfreedom _______itsvalue .
Well let you use the room ______you keep it clean and tidy .
Is thisthe research center _____you visited thelablast year ?
Don’t believe him .He is just _____ an excuse .
-Would you mind if I take the seat? - .