1.
The ancestors of the horse lived ..... and were about half a meter tall.
2.
The museum on Ellis Island, a former immigration station, contains documents and artifacts......to four centuries of United States immigration.
3.
......, particularly the oxides of sulfur, greatly increases the rate at which rust forms.
4.
The Sun, the Moon, and Earth have magnetic fields,
and ......evidence that the stellar that extend through vast regions galaxies have fields of space.
5.
The “confederation school” poets of nineteenth-century Canada were primarily nature poets, ----- a wealth of eulogies to Canadian rural life.
6.
Since prehistoric people first applied natural pigments to cave walls, ---- have painted to express themselves.
7.
About 42 million bushels of oats are used annually --- manufacture of breakfast foods in die United States.
8.
Any acid can, in principle, neutralize any base, although ....... between some of the more reactive compounds.
9.
Just over two-thirds of Earth’s surface is covered by wafer, ...... more than 98 percent of this water is contained in the oceans.
10.
Pleasing to look at and touch, beads come in shapes, colors, and materials .......to handle and to sort them.
11.
In 1978 the united States National Air and Space Administration selected Sally Ride.......the first woman astronaut.
12.
Adhesions are ....... formed within the body in response to inflammation or injury.
13.
The planet Neptune is about 30 times ...... from the Sun as Earth is.
14.
Not until the 1850's ...... a few public-spirited citizens and state legislatures seek to rescue historic buildings in the United States from destruction or alteration.
15.
----- 200 bones forming the framework, or skeleton, of the human body.
