Change the sentences into passive voice1

bài 1 : Change the sentences into passive voice
1.My mother often prepares dinner
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2. The acupuncturist will ask the patient to live down
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3. Sometimes people heat the needles or stimulate them with electricity after insertion
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4.  Everyday they vacuum my bedroom
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5.They are going to build 10 more mini marts in dongha ciy
--->
6.They do not often invite Tom wedding parties
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7. My mother is making a birthay cake
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8. They will change the food price at the end of this month
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