This is ________ public place for us to do some reading. Don’t talk or laugh loudly in _____ public.

____to caring for an Ebola(埃博拉) patient, the nurse found herself also infected, feeling hopeless.

Obama didn’t explain ______ any larger principles have guided him through the historic convulsions of the 2011 Arab Spring.

Peter was fired again. He really didn’t know _____ went wrong.

Mrs. Smith found the toys here and there, so she asked her son to ______ his toys before having dinner.