Заполните пропуски с правильным вспомогательным глаголом Fill in the blanks with the proper auxiliary verb.

l. She... attending courses for studying the English language. 2. He ... just made a model aeroplane. 3. They... singing songs now 4. She playing the piano all the evening yesterday 5. He presented his collection to the museum. 6. My friend bought this rare book at the jumble-sale. 7. The unique collection of ancient books presented to him by his father. 8. The books found by the collectors in rare-book shops. 9. Books on a particular subject included in subject collections. 10. Some books translated into different languages.