An affair can be arduous.Logical formLearned from27 sentences. A drive can be arduous.Logical formLearned from27 sentences. An experience can be arduous.Logical formLearned from26 sentences. Trips can be arduous.Logical formLearned from26 sentences. Treks can be arduous.Logical formLearned from26 sentences. An one can be arduous.Logical formLearned from26 sentences. A recovery can be arduous.Logical formLearned from26 sentences. An expedition can be arduous.Logical formLearned from25 sentences. Ascents can be arduous.Logical formLearned from25 sentences. A preparation can be arduous.Logical formLearned from25 sentences. A negotiation can be arduous.Logical formLearned from25 sentences. Crossings can be arduous.Logical formLearned from24 sentences. Labours can be arduous.Logical formLearned from24 sentences. An exercise can be arduous.Logical formLearned from24 sentences. A chore can be arduous.Logical formLearned from24 sentences.