1.   All the energy and anxiety engendered by this fluctuating environment were on display last week in a shrill televised debate ineffectually moderated by Larry King.

2.   He took moderate positions in an often shrill debate, pointing out, for instance, that if used safely and judiciously, additives could enhance a food product.

3.   The often shrill debate is colored with talk about defending the fatherland.

4.   The Africans are at the center of an increasingly shrill debate over immigration that risks polarizing the country.