_______ such heavy pollution already, it may now be too late to clean up the river.
Ladies and gentlemen, I have the great privilege____ introducing our speaker for tonight.
_______ you may have, you should gather your courage to face the challenge.
The teacher recommended that everyone _______ this dictionary.
I admired my classmate Lisa very much. ______ her prettiness, she was smart and helpful.
_______ about wild plants that they decided to make a trip to Madagascar for further research.