In some countries, milk producers add vitamin D to milk so children will get enough.

VOA: special.2009.04.21

You can also perform a test. Take some of the material and add enough water to it to make it seem like you are making bread.

VOA: special.2009.09.14

Some add their husband's last name at the end.

VOA: special.2009.07.06

Some people add information to their blogs every day.

VOA: special.2009.04.19

For example, the New York State Department of Environmental Conservation lists some dos and don'ts of composting on its Web site: Do add lime, small amounts of wood ashes or crushed eggshells to the compost pile.

VOA: special.2009.06.23