An answer to a question can be difficult.Logical formLearned from25 sentences. Opportunities can be difficult.Logical formLearned from25 sentences. Cleaning can be difficult.Logical formLearned from25 sentences. (Money market conditions) can be difficult.Logical formLearned from25 sentences. Sacrifices can be difficult.Logical formLearned from25 sentences. Topics can be difficult.Logical formLearned from25 sentences. A teacher can be difficult.Logical formLearned from25 sentences. A person may make difficult.Logical formLearned from25 sentences. A par can be difficult.Logical formLearned from25 sentences. (Health problems) can be difficult.Logical formLearned from25 sentences. Labor can be difficult.Logical formLearned from25 sentences. A run can be difficult.Logical formLearned from25 sentences. A routine can be difficult.Logical formLearned from25 sentences. Adjustments can be difficult.Logical formLearned from25 sentences. Reception can be difficult.Logical formLearned from25 sentences.