(Air travel) can be arduous.Logical formLearned from3 sentences. Reviews can be arduous.Logical formLearned from3 sentences. Exams can be arduous.Logical formLearned from3 sentences. A probe can be arduous.Logical formLearned from3 sentences. A pace can be arduous that something-is-the-case.Logical formLearned from3 sentences. Fishing can be arduous.Logical formLearned from3 sentences. Courses can be arduous.Logical formLearned from3 sentences. A (registration process) can be arduous.Logical formLearned from3 sentences. A development can be arduous.Logical formLearned from3 sentences. (Reporting requirements) can be arduous.Logical formLearned from3 sentences. A strategy can be arduous.Logical formLearned from3 sentences. Auditions can be arduous.Logical formLearned from3 sentences. Applications can be arduous.Logical formLearned from3 sentences. An entry can be arduous.Logical formLearned from3 sentences. Efforts can be arduous.Logical formLearned from3 sentences.