Find and correct a mistake in each sentence:

Ex3. Find and correct a mistake in each sentence:
1. My brother used to going to the movies with our father.
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2. Hoa asked me if I could have a picnic with her in the country or not.
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3. Most of monkeys both in the forest and in the zoo are interesting in bananas.
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4. It takes Nam thirty minutes going to school on foot everyday.
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5. Not only Ha but also her friends was present in my fifteenth birthday party.
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