14.Written to be performed on a _____,Thornton Wilder's play Our Town depicts life in a small New England community.

(A)stage scenery of bare(B)bare of stage scenery

(C)scenery bare of stage

(D)stage bare of scenery.

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

(A)They are

(B)There are

(C)Of the

(D)The

16.A food additive is any chemical that food manufactures intentional add to their

A B C

products.

D

17.Margaret Mead studied many different cultures,and she was one of the first

A B C

anthropologists to photograph hers subjects.

D

18.Talc,a soft mineral with a variety of uses,sold is in slabs or in powdered from.

A B C D

19.During the 1870's iron workers in Alabama proved they could produce iron by

A B

burning iron ore with coke,instead than with charcoal.

C D

20.Geologists at the Hawaiian Volcano Observatory rely on a number of instruments

A B C

to studying the volcanoes in Hawaii.

D