Difficulty may keep_up with payments.Logical formLearned from4 sentences. A regulator may keep_up with a market.Logical formLearned from4 sentences. A student may keep_up with schoolwork.Logical formLearned from4 sentences. Wonders may keep_up kids.Logical formLearned from4 sentences. Warplanes may keep_up an assault.Logical formLearned from4 sentences. Commanders may persist in keep_upping appearances.Logical formLearned from4 sentences. An administration may keep_up pressure on a country.Logical formLearned from4 sentences. A trail may be keep_uped.Logical formLearned from4 sentences. A female may keep_up with (supply problems).Logical formLearned from4 sentences. Revenue may keep_up with investments.Logical formLearned from4 sentences. A female may keep_up with friends.Logical formLearned from4 sentences. Trouble may keep_up with traffic.Logical formLearned from4 sentences. Persons may keep_up with names.Logical formLearned from4 sentences. A male may keep_up with bills.Logical formLearned from4 sentences. A manufacturer may keep_up with demand.Logical formLearned from4 sentences.