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She _______ blood twenty times so far.

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American _______ the tradition of volunteering and helping one another since the early days of the country.

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I ______ blood twice and _____ presents to sick children in the hospital recently.

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He ______ lectures to foreign tourists about traditional food and games recently.

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At Tet, my sister and her close friends often go to the hospitals to donate cakes, sweets and toys for the sick children there. They ______ it for many years.

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My hobby is carving eggshells and now I _____ nearly 100.

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Lan ______ English for more than a year but she can speak it very well.

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Mary’s mother _____ her to sing since she was five

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Lan ____ Banh Tet. She will try some this year.

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I ____ hundreds of old books and clothes for street children so far.

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Linh is my close friend. We _____ each other for 5 years.

He _______ books for poor children for years.

Fill in the blank with the correct form of the verb.

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Fill in the blank with the correct form of the verb.