Structure

Martha Graham, ______ of the pioneers of the modern dance, didn’t begin dancing until she was twenty-one.

Tiger Moths ______ wings marked with stripes or spots.

Platinum is harder than copper and is almost as pliable _______ .

Most of Annie Jump Cannon’s career as an astronomer involved the observation, classification, and _________

Many communities are dependent on groundwater ______ from wells for their water supply.

_______ experimental studies of the aging process, psychologist Ross McFarland determined that people could work productively much longer than had previously been thought.

______ often raise funds from the sale of stock.

While all birds are alike in that they have feathers and lay eggs, ______ great differences among them in terms of size, structure, and color.

There were ______ federal laws regulating mining practices until 1872.

The Masters, one of the most important of all golf tournaments, _______ every year in Augusta, Georgia.

Not only _______ places of beauty, they serve scientific and educational purposes as well.

________ quicksand can be found all over the world, little was known about its composition until recently.

In 1791 Quebec was divided into two sections, Upper Canada and Lower Canada, _______ were ruled by elected assemblies.

______ are a form of carbon, has been known since the late eighteen century.

Designed by Frederic Auguste Bartholdi, ________