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用所给的适当形式填空。 l. It takes my mother an hour _____ (listen) to music. 2. Emily _____ (not take) the train to school from Monday to Friday. 3. They enjoy _____ (their) on Sundays. 4. There are many tall buildings now in many _____ (city). 5. Is Caral _____ (ride) his bike? 6. He has two ways of _____ (get) to school. 7. In summer people often go swimming in ______ (river). 8. We need _____ (study) again after school. 9. Listen! A small number of students _____ (talk) in the classroom. 10. They usually ride their _____ (bike) to work.