English grammar error-spotting (present perfect with ‘‘so far’’ and object phrase): Identify the erroneous part; consider correct tense with ‘‘so far’’ and placement of adverbials: ‘‘In spite of several reminders, / he did not so far send / any reply to me, letters. / No error.’’

Given data

• A: ‘‘In spite of several reminders,’’
• B: ‘‘he did not so far send’’
• C: ‘‘any reply to me, letters.’’
• D: ‘‘No error.’’

Concept / Approach
With time adverbials meaning ‘‘up to now’’ (‘‘so far’’), the present perfect is required. Word order also places ‘‘so far’’ mid-clause.

Step-by-Step evaluation
Part B wrongly uses simple past: should be ‘‘has not so far sent’’.

Correction
‘‘In spite of several reminders, he has not so far sent any reply to my letters.’’ (Note: ‘‘to my letters’’ is the natural object phrase; punctuation errors are to be ignored.)

Common pitfalls

• Using simple past with ‘‘so far / up to now’’ instead of present perfect.

Final Answer
he did not so far send