Написать письмо другу который пригласил Вас в кино, но Вы не можете пойти помучто заболели, приетом не забудьте сказать "спасибо за приглашение" 
НА АНГЛИЙСЬКОМ ЯЗЫКЕ, НЕ МЕНЬШЕ ЧЕМ 6 ПРЕДЛОЖЕНИЙ

Dear friend, I write you because I can't go to the cinema with you. I became ill. Can we go to the cinema another day? I think I'll be all right after two days. There are a lot of interesting films showed in the cinema that day. Excuse me again. I'm very thankful for your inviting. Your respectfully, ...