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Переведите предложения, обращая особое внимание на форму глагола-сказуемого
1. New underground lines are being built in Moscow. 2. When I went to Leningrad in 1957, the first underground line was still being built. 3. Are they ready with the parcel? No, it's still being parked. 4. Listen carefully, a new grammar rule is being explained. 5. Mr. Brown is at the hospital now. His son is being operated on. 6. Negroes in America are often arrested only because they fight for their rights.