Grammar Exercise Generator — illustrative example

INPUT
Learner is practicing past simple versus present perfect in English; use one item with a finished time.

RESULT
Exercise: I ___ the report yesterday. Options: finished / have finished.
Answer: finished. Yesterday names a completed past time, so past simple fits this sentence.

REVIEW
Grammar exercises should target one rule and include a checked answer key. Keep distractors plausible and explain why the correct answer fits the context instead of only marking a letter.

This is a teaching example, not a live execution record.