Some countries may operate some (trade monopolies).Logical formLearned from6 sentences. A (domino theory) may operate in reverse.Logical formLearned from6 sentences. A remote-controlled car may be operated in a manner.Logical formLearned from6 sentences. A (food stall) may operate above a public market.Logical formLearned from6 sentences. A person may operate on (transplant persons).Logical formLearned from6 sentences. Some stores may operate under names.Logical formLearned from6 sentences. The economy may operate in a (danger zone).Logical formLearned from6 sentences. Elected officials may operate in a system.Logical formLearned from6 sentences. Canadian companies may operate in a country.Logical formLearned from6 sentences. The economy may operate at unemployment.Logical formLearned from6 sentences. A male may operate an office.Logical formLearned from6 sentences. A company may operate casual-dining restaurants.Logical formLearned from6 sentences. A program may operate in a US-city.Logical formLearned from6 sentences. Members may operate in emerging markets of a continent.Logical formLearned from6 sentences. A company may operate (radio stations).Logical formLearned from6 sentences.