1) In the textile industry, the term “gunny” refers to _____ burlap that is not of the best quality.

2) The skyscraper, _____,is an architectural form that originated in the United States.

3) _____ were stones piled at intervals.

4) Some procedures used for laboratory analysis of archaeological specimens are _____ procedures conducted in crime laboratories.

5) The windmill, which has been used for hundreds of years to pump water and grind grains, _____ redesigned to produce electricity.

6) From her early teens _____

7) Adhesive, such as glue, tape, and gum, vary with the purpose _____ intended.

8) Alaskan forests _____ five or six miles inland from the Pacific coast.

9) The colors of a rainbow _____ arranged in the same order.

10) _____, The Yearling, won a Pulitzer Prize.

11) With age, the mineral content of human bones decreases, _____ them more fragile.

12) Not until Kentucky’s Mammoth Cave had been completely explored in 1972 _____.

13) The first explorer _____ California by land was Jedediah Strong Smith, a trapper who crossed the southwestern deserts of the United States in 1826.

14) In 1867 Russia sold Alaska to the United States, and in 1958 _____ the forty-ninth state.

15) _____ many copper mines in the state of Arizona, a fact which contributes significantly to the state’s economy.