Some doctors suggest that vinegar will ____ people from being infected ___ H1N1.
The path to dreams may not be smooth and even at great cost, but ______ on to them.
I dislike those programs ______ viewers call in to talk about their private problems.
The hotel turned us down because we didn’t make reservations, but we ______ have.
Home-working opportunities and ______ working hours are top concerns for the working mothers.
Personal relationships ______ over years may be lost when we move houses.