Using Commas to Set Off Appositives and Interrupters

1. Some rooms in fact are full of echoes, dead zones, and mechanical noises that make it hard for students to hear.

   Question

   A.

   Some rooms, in fact are full of echoes, dead zones, and mechanical noises that make it hard for students to hear.

   B.

   Some rooms, in fact, are full of echoes, dead zones, and mechanical noises that make it hard for students to hear.

   C.

   Some rooms, in fact, are full of echoes dead zones and mechanical noises that make it hard for students to hear.

   Using Commas to Set Off Appositives and Interrupters - Question 1
2. The American Speech-Language-Hearing Association experts on how noise levels affect learning abilities has set guidelines for how much noise in a classroom is too much.

   Question

   A.

   The American Speech-Language-Hearing Association, experts on how noise levels affect learning abilities, has set guidelines for how much noise in a classroom is too much.

   B.

   The American Speech-Language-Hearing Association experts, on how noise levels affect learning abilities, has set guidelines for how much noise in a classroom is too much.

   C.

   The American Speech-Language-Hearing Association experts on how noise levels affect learning abilities, has set guidelines for how much noise in a classroom is too much.

   Using Commas to Set Off Appositives and Interrupters - Question 2
3. The association recommends that background noise the constant whirring or whining sounds made by radiators, lights, and other machines be no more than 35 decibels.

   Question

   A.

   The association recommends that background noise, the constant whirring or whining sounds made by radiators, lights, and other machines be no more than 35 decibels.

   B.

   The association recommends that background noise the constant whirring or whining sounds made by radiators, lights, and other machines, be no more than 35 decibels.

   C.

   The association recommends that background noise, the constant whirring or whining sounds made by radiators, lights, and other machines, be no more than 35 decibels.

   Using Commas to Set Off Appositives and Interrupters - Question 3
4. That level 35 decibels is about as loud as a whispering voice 15 feet away.

   Question

   A.

   That level 35 decibels is about as loud as a whispering voice, 15 feet away.

   B.

   That level, 35 decibels is about as loud as a whispering voice 15 feet away.

   C.

   That level, 35 decibels, is about as loud as a whispering voice 15 feet away.

   Using Commas to Set Off Appositives and Interrupters - Question 4
5. One study found a level of 65 decibels the volume of a vacuum cleaner in a number of classrooms around the country.

   Question

   A.

   One study found a level of 65 decibels, the volume of a vacuum cleaner, in a number of classrooms around the country.

   B.

   One study found a level of 65 decibels the volume, of a vacuum cleaner, in a number of classrooms around the country.

   C.

   One study, found a level of 65 decibels the volume of a vacuum cleaner in a number, of classrooms around the country.

   Using Commas to Set Off Appositives and Interrupters - Question 5
6. Other classroom noises came for example from ancient heating systems, whirring air-conditioning units, rattling windows, humming classroom computers, buzzing clocks, and the honking of traffic on nearby streets.

   Question

   A.

   Other classroom noises came, for example from ancient heating systems, whirring air-conditioning units, rattling windows, humming classroom computers, buzzing clocks, and the honking of traffic on nearby streets.

   B.

   Other classroom noises came, for example, from ancient heating systems, whirring air-conditioning units, rattling windows, humming classroom computers, buzzing clocks, and the honking of traffic on nearby streets.

   C.

   Other classroom noises came for example, from ancient heating systems, whirring air-conditioning units, rattling windows, humming classroom computers, buzzing clocks, and the honking of traffic on nearby streets.

   Using Commas to Set Off Appositives and Interrupters - Question 6
7. An increasing number of school districts are beginning to pay more attention to acoustics the study of sound when they plan new schools.

   Question

   A.

   An increasing number of school districts are beginning to pay more attention to acoustics, the study of sound when they plan new schools.

   B.

   An increasing number of school districts are beginning to pay more attention to acoustics the study of sound, when they plan new schools.

   C.

   An increasing number of school districts are beginning to pay more attention to acoustics, the study of sound, when they plan new schools.

   Using Commas to Set Off Appositives and Interrupters - Question 7
8. Some changes such as putting felt pads on the bottoms of chair and desk legs to keep them from scraping against the floor are simple and inexpensive.

   Question

   A.

   Some changes, such as putting felt pads on the bottoms of chair and desk legs to keep them from scraping against the floor, are simple and inexpensive.

   B.

   Some changes such as putting felt pads, on the bottoms of chair and desk legs, to keep them from scraping against the floor are simple and inexpensive.

   C.

   Some changes, such as putting felt pads on the bottoms of chair and desk legs to keep them from scraping against the floor are simple and inexpensive.

   Using Commas to Set Off Appositives and Interrupters - Question 8
9. Other changes however can be costly and controversial; these changes include buying thicker drapes, building thicker walls, or installing specially designed acoustic ceiling tiles.

   Question

   A.

   Other changes however can be costly and controversial; these changes, include buying thicker drapes, building thicker walls, or installing specially designed acoustic ceiling tiles.

   B.

   Other changes, however, can be costly and controversial; these changes include buying thicker drapes, building thicker walls, or installing specially designed acoustic ceiling tiles.

   C.

   Other changes however, can be costly and controversial; these changes include buying thicker drapes, building thicker walls, or installing specially designed acoustic ceiling tiles.

   Using Commas to Set Off Appositives and Interrupters - Question 9
10. School administrators often parents themselves hope that these improvements will result in a better learning environment for students.

    Question

    A.

    School administrators, often parents themselves, hope that these improvements will result in a better learning environment for students.

    B.

    School administrators often parents themselves hope that these improvements, will result in a better learning environment for students.

    C.

    School administrators often parents themselves hope that these improvements will result, in a better learning environment, for students.

    Using Commas to Set Off Appositives and Interrupters - Question 10