Manufacturers may keep_up with demand.Logical formLearned from12 sentences. A problem may keep_up with a demand.Logical formLearned from12 sentences. A grandparent may keep_up with some grandchildrens.Logical formLearned from12 sentences. A person may keep_up with a conversation.Logical formLearned from12 sentences. Persons may keep_up progress.Logical formLearned from12 sentences. Files may be keep_uped to date.Logical formLearned from12 sentences. Students may keep_up with reading.Logical formLearned from12 sentences. Militants may keep_up attacks.Logical formLearned from12 sentences. A country may keep_up an assault.Logical formLearned from12 sentences. Warplanes may keep_up attacks on a country.Logical formLearned from12 sentences. A country may keep_up a drumbeat of complaints.Logical formLearned from12 sentences. A country may keep_up a criticism.Logical formLearned from12 sentences. A US-president may keep_up a pace.Logical formLearned from12 sentences. A person may keep_up a level.Logical formLearned from12 sentences. Persons may keep_up protests.Logical formLearned from12 sentences.