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V. Give the correct form of the verbs in brackets.
19. She (fly) ______________ to Da Nang many times but last year she went there by train.
20. You (do) ______________ morning exercise every day?
21. My father enjoys (carve) ______________ eggshells so much.
22. Many precious relics (display) ______________ in the Temple of Literature.
23. Food and drink (not sell) ______________ in the Temple of Literature.
24. I (collect) ______________ stamps when I was a child.