English Grammar — Error Spotting (Prepositions with 'suffer') Identify the part that contains a grammatical error. If there is no error, choose 'No error'. Full sentence: Though he suffered of fever, he attended office and completed all the pending work by sitting late.

Introduction / Context:
This problem evaluates correct prepositional usage after verbs. With "suffer," standard collocations are "suffer from + illness" and "suffer + injury" (without a preposition).

Given Data / Assumptions:

• Sentence: "Though he suffered of fever, he attended office and completed all the pending work by sitting late."
• Target: Identify the erroneous fragment.

Concept / Approach:

In idiomatic English, we say "suffered from fever," not "suffered of fever." The preposition "of" is incorrect in this collocation.

Step-by-Step Solution:

1) Locate verb + preposition pairing: "suffered of".2) Replace with "suffered from."3) The remaining clauses are grammatically acceptable though "attended office" could be improved to "attended the office" or "went to the office."4) Conclude part A is erroneous.

Verification / Alternative check:

Corrected: "Though he suffered from fever, he went to the office and completed all the pending work by staying late."

Why Other Options Are Wrong:

B: Acceptable in many exam registers; article usage may vary regionally.C: Grammatically fine as the start of a compound predicate.D: "by sitting late" is idiomatic regionally; "by working late" might be stylistically better.E: Not applicable; A contains the error.

Common Pitfalls:

Confusing "suffer from" with "suffer of" due to literal translations. Always learn verb–preposition collocations.

Final Answer:

Though he suffered of fever,