Question

practice the skill
insert any missing commas and circle any unnecessary commas. write c to the left of the number if the sentence is correct.

1. though not as famous as their fathers, white house children have made their own marks on history.
2. for example, john quincy adams became the sixth president in 1825.
3. esther cleveland, interestingly enough was the only child born in the white house.
4. maria monroe, on the other hand, receives special honor as the first to have her wedding in the white house.
5. martin van burens son married the niece of washington irving.
6. in some cases, however, the grandchildren of the presidents lived in the white house.
7. unfortunately, the white house had not yet been built when george washingtons grandchildren and great - grandchildren lived with him during his presidency.
8. mary custis, who was george washingtons great - granddaughter, married robert e. lee.
9. the marriage of julie nixon and david eisenhower joined two former white house children.
10. furthermore, president eisenhower, named camp david, a presidential retreat in maryland after his grandson david.

Explanation:

• 21: The comma after "fathers" is correct as it separates the introductory clause "Though not as famous as their fathers" from the main clause.
• 22: Insert a comma after "example" because "For example" is an introductory phrase.
• 23: Insert a comma after "Cleveland" to set off the parenthetical "interestingly enough".
• 24: Circle the comma after "hand" because "on the other hand" is a non - essential phrase and should have commas on both sides. So, it should be "Maria Monroe, on the other hand, receives...".
• 25: The sentence is correct (C) as there are no missing or unnecessary commas.
• 26: Insert a comma after "cases" to set off "however" which is a conjunctive adverb.
• 27: Insert a comma after "Unfortunately" as it is an introductory adverb.
• 28: The commas around "who was George Washington's great - granddaughter" are correct as it is a non - restrictive relative clause.
• 29: Circle the comma after "joined" because there is no need for a comma there.
• 30: Insert a comma after "Furthermore" as it is an introductory adverb.

Answer:

1. No change (comma after "fathers" is correct).
2. For example, John Quincy Adams became the sixth president in 1825.
3. Esther Cleveland, interestingly enough, was the only child born in the White House.
4. Maria Monroe, on the other hand, receives special honor as the first to have her wedding in the White House (circle the comma after "hand" in the original).
5. C
6. In some cases, however, the grandchildren of the presidents lived in the White House.
7. Unfortunately, the White House had not yet been built when George Washington's grandchildren and great - grandchildren lived with him during his presidency.
8. No change (commas around the relative clause are correct).
9. The marriage of Julie Nixon and David Eisenhower joined two former White House children (circle the comma after "joined" in the original).
10. Furthermore, President Eisenhower named Camp David, a presidential retreat in Maryland after his grandson David.