Punctuation Exercise

Edit the following sentences. Pay particular attention to the correct use of apostrophes, colons and commas.

Down syndrome has been linked to a defect on a tiny slice of one of the human chromosomes, an important step toward prevention and treatment of the disorder researchers said Saturday.

“By mapping a gene, you can find it, isolate it, and develop new means of therapy,” said Dr. Frank Ruddle of Yale University one of the organizer’s of the conference.

At the Ninth International Gene Mapping Workshop two years ago in Paris, scientists had mapped about 1000 human genes.

The announcement of 400 new genes Saturday, brings the total to nearly 2000, an increase of more than one-fourth over what it was two weeks ago.

The Immigration and Naturalization Service has proclaimed the law a clear success, but the current administration has yet to put its own stamp on immigration policy.

“The legislation bought time for everyone and made the problems more manageable for a while,” said Leonel J. Castillo, former I.N.S. commissioner.

The law offered legal status to immigrants who had lived in the United States continuously since before Jan. 1, 1982 and imposed penalties on employers who knowingly hired illegally.

He said he had but one thing on his mind: sleeping.

Gardeners who wear broad brimmed hats, coveralls, and heavy duty gloves while using an electric hedge clipper to trim bushes, are displaying common sense—but not enough of it says the American Optometric Association.

The garb protects the face from the sun , and clothing and hands from the wear and tear of yard work, but the eyes are left exposed and vulnerable to flying twigs leaves and other debris.

- Courtesy, “Creative Editing.”