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Common Errors Workbook |
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Punctuation and mechanics |
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27. Commas with that and which clauses |
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In each of the following questions choose whether a comma is needed or not.
Women __1__ (comma/no comma) who are more subject to osteoporosis than men, are advised to consume foods rich in calcium. Calcium can come from supplements or from dairy products and other foods __2__ (comma/no comma) that are good sources of calcium. A recent study showed that British women __3__ (comma/no comma) who drank at last one cup of tea per day had denser bones than those who didn't.
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