Write questions for the underlined words

Bài 1:
Write questions  for the underlined words.
6. Last saturday, my friends volunteered "at the health center".
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7. My uncle "raised money" to help children with cancer.
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8. The students planted trees along the streets "to make the town greener".
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9. I recycled "cans and bottles" to help the environment.
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10. they organized "three" beach clean-ups last years.
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