Introduction / Context:
The item checks agreement and correct use of possessive time expressions. The sentence is split into segments to test if any part violates standard grammar.
Given Data / Assumptions:
- Compound subject: “All his relatives except his daughter”.
- Plural agreement with “have”.
- Fixed expression: “a month’s vacation”.
Concept / Approach:
“Except his daughter” is a prepositional exception that does not change the plurality of the subject “relatives.” Therefore, “have gone” is correct. The possessive time-length construction “a month’s vacation” is idiomatic and grammatically sound.
Step-by-Step Solution:
Subject–verb: “relatives … have” shows correct plural agreement.Prepositional exception: “except his daughter” is standard and does not trigger singular verb.Time phrase: “a month’s vacation tour” follows possessive-length pattern (e.g., “a day’s work”).
Verification / Alternative check:
Alternative forms like “a one-month vacation tour” are also correct but not necessary. The original remains grammatically acceptable.
Why Other Options Are Wrong:
They are not wrong; each segment adheres to standard grammar and idiom.
Common Pitfalls:
Forcing singular agreement due to the nearby singular “daughter”; replacing the possessive time construction with a less idiomatic variant unnecessarily.
Final Answer:
No error.
Discussion & Comments