Revising sentences for agreement.
There is either an error in subject-verb agreement or an error in pronoun-antecedent agreement
1. Two dollars were once considered generous pay for an hour's work. My answer: Two dollars was once considered generous pay for and hour's work.
2. All of the travelers were surprised when he or she saw the old purple-and-yellow bus. My answer: All the travelers were surprised when they saw the old purple-and-yellow bus.
3. An international team of archaeological researchers is assembling, one by one, at the site of exciting discovery. My answer: An international team of archaeological researchers are assembling, one by one, at the site of exciting discovery.
4. Do Cindy and Brenda practice her dance routine here every day? My answer: Did Cindy and Brenda practice her dance routine here every day?
5. The two performers has become one of the most popular teams in the history of comedy. My answer: The two performers have become one of the most popular teams in the history of comedy.
4. No.
The others are right.
4. Does Cindy and Brenda practice there dance routine here every day.
Still not right.
Cindy and Brenda are the subjects.
Hint: also pay attention to spelling.
Does Cindy and Brenda practice their dance routine here every day?
DO Cindy and Brenda . . .
With that correction, your sentences are right.
1. The correction you provided, "Two dollars was once considered generous pay for an hour's work," is incorrect. The original sentence is correct because "two dollars" is plural, so "were" is the appropriate verb form to agree with it. The subject-verb agreement is already accurate.
2. Your correction, "All the travelers were surprised when they saw the old purple-and-yellow bus," is correct. The original sentence incorrectly used "he or she" as a singular pronoun to refer to "travelers," which is plural. Replacing it with the plural pronoun "they" makes the pronoun-antecedent agreement correct.
3. Your correction, "An international team of archaeological researchers are assembling, one by one, at the site of exciting discovery," is incorrect. The original sentence is correct because the subject "team" is singular, so "is" is the appropriate verb form to agree with it. The subject-verb agreement is already accurate.
4. Your correction, "Did Cindy and Brenda practice her dance routine here every day?" is incorrect. The original sentence incorrectly used "her" to refer to the plural subject "Cindy and Brenda." The correct pronoun to use in this case is "their." The corrected sentence would be: "Did Cindy and Brenda practice their dance routine here every day?"
5. Your correction, "The two performers have become one of the most popular teams in the history of comedy," is correct. The original sentence incorrectly used "has" as the verb form to agree with the plural subject "two performers." The correct verb form for subject-verb agreement is "have" in this case.