Spot the part of the sentence that contains an error.
If there is no error, choose D.
Show answer & explanation
Correct answer: C
Explanation
Correct Answer
because she looks very tired today.
Explanation
Logical and Tense Consistency Error The sentence structure creates a logical contradiction between the deduction being made and the cause provided for it.
Breakdown of the Clauses
The first part of the sentence uses a past modal deduction: "She must have left the office early yesterday..." This means the speaker is certain that an action happened in the past.
The second part introduces a reason: "...because she looks very tired today."
The Contradiction Leaving work early yesterday would logically make someone feel rested, not tired today. Conversely, looking tired today cannot be the visual evidence or cause for concluding that someone got to go home early yesterday. To fix the logical flaw while keeping the context of her being tired, the sentence should say she must have left late, or that she must have stayed at the office late yesterday.
Because the error lies in the flawed semantic relationship between leaving early and looking tired today, this segment contains the mistake.
Key Points
Error Segment because she looks very tired today.
Flaw Semantic and logical mismatch with the premise of leaving work early the previous day.
Grammatical Role Error identification (tests the ability to evaluate semantic cohesion and situational logic between past deductions and present observations).