Multiple choice (A)He worked hard (B)so he might top the list (C)and win a medal.(D)No error (A) (B) (C) (D) Reveal answer Fill a bubble to check yourself B Correct answer Explanation The conjunction 'so' used to express purpose should ideally be 'so that.' While 'so' is common in speech, 'so that' is the grammatically complete form required in formal writing for clarity.