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Common Errors Workbook |
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Punctuation and mechanics |
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33. Identifying compound sentences that require commas |
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In each of the following questions determine whether a comma is needed.
The most important criteria for ranking the printers are the number of pages printed per __1__ (minute, and/minute and) the price of the printer. A laser printer usually prints __2__ (faster, but/faster but) an inkjet printer usually costs less. Both types of printers are going down in __3__ (price, so/price so) some people own one of each.
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