Нужно перефразировать эти фразы используя во втором предложении каждого пункта модальный глагол. 1. there isn't an answer from her phone. she is out. 2. i am not sure. we deliver these boxes in a week. 3. something wrong with your back. i think you have to see a doctor. 4. a rich man is arrested. he has a lawyer.