1.
From 1949 onward ,the artist Georgia O’keeffe made New Mexico -----.
2.
Just as remote-controlled satellites can be employed to explore outer space, ---- employed to investigate the deep sea.
3.
In --- people, the areas of the brain that control speech are located in the left hemisphere.
4.
Stars shine because of ---- produced by the nuclear reactions taking place within them.
5.
---- is not clear to researchers.
6.
Although many people use the word “milk” to refer to cow’s milk,--- to milk from any mammal, including human milk and goat’s milk.
7.
The first transatlantic telephone cable system was not established --- 1956.
8.
---- on two people think exactly alike, there will always be disagreement, but disagreement should not always be avoided: it can be healthy if handled creatively.
9.
Drinking water ---- excessive amounts of fluorides may leave a stained or mottled effect on the enamel of teeth.
10.
In the 1820’s physical education became --- of the curriculum of Harvard and Yale Universities.
11.
Pewter, ---- for eating and drinking utensils in colonial America, is about ninety percent tin, with copper or bismuth added for hardness.
12.
A moth possesses two pairs of wings --- as a single pair and are covered with dislike scales.
13.
Soap operas, a type of television drama series, are so called because, at first they were ----.
14.
The Woolworth Building in New York was the highest in America when --- in 1913 and was famous for its use of Gothic decorative detail.
15.
Humans,----, interact through communicative behavior by means of signs or symbols used conventionally.
