"If I had not gone to school, I would not have known how to read"
Translation:Nisingalikwenda shule nisingalijua kusoma
After insisting on -enda instead of -kwenda for almost the entire course, suddenly -kwenda is required and -enda is wrong. "Nisingalienda shule nisingalijua kusoma" should be accepted here. For the longer term, it would be great if additions to acceptable answers were made throughout the course to reflect that -enda and -kwenda are equally correct in almost all sentences. The only exceptions I can think of are the imperative (nenda/nendeni) and the subjunctive (uende, usiende).