A person may be confronted with a busy signal.Logical formLearned from5 sentences. A busy signal can be steady.Logical formLearned from5 sentences. A busy signal can be at a (theater box office).Logical formLearned from5 sentences. A cemetery can be busy.Logical formLearned from5 sentences. Technology can be busy.Logical formLearned from5 sentences. A week may get busy.Logical formLearned from5 sentences. A (shopping corridor) can be busy.Logical formLearned from5 sentences. Flights can be busy.Logical formLearned from5 sentences. Guards can be busy.Logical formLearned from5 sentences. (Shipping channels) can be busy.Logical formLearned from5 sentences. Critics can be busy.Logical formLearned from5 sentences. Speedways can be busy.Logical formLearned from5 sentences. A president can be busy that something-is-the-case.Logical formLearned from5 sentences. Peers can be busy.Logical formLearned from5 sentences. Frames can be busy.Logical formLearned from5 sentences.