1.
In 1864 Nevada entered the United States as _______ thirty-sixth state.
2.
Bob Stephenson, a biologist in Alaska who studies the Canadian lynx, a type of wildcat, has learned_______ from studying their tracks in the snow.
3.
______ lay eggs, but some give birth to live young.
4.
Author Sarah Jewett established her literary reputation with Deephaven, a collection of sketches_______ .
5.
By means of various types of wind tunnels,_______ simulate most of the flight conditions to which an airplane is subjected.
6.
______ planes in flight between airports, air traffic controllers rely on radar.
7.
The operating principles of the telephone are_______ they were in the nineteenth century.
8.
Steel magnate Andrew Carnegie used part of his wealth _______ more than 2,500 public libraries in English-speaking countries between 1881 and 1919.
9.
Not until 1949_______ Canada’s tenth province.
10.
Paul Samuelson revolutionized_______ by presenting his students with the most advanced economic thinking at an introductory level.
11.
The term belles-letters is used to denote literary forms that contain_______ ,such as drama, poetry, essays, and novels.
12.
Open-pit mining follows the same sequence of operations _______ mining: drilling, blasting, and loading and removing waste and ore.
13.
______ in cases where special oxidants are used, fires are the result of a fuel rapidly combining with the oxygen in the air.
14.
Maya Angelou’s widely acclaimed autobiography, I know Why the Caged Bird Sings, is a moving and_______ of her childhood in segregated Arkansas.
15.
______ to study element 104 because only a few atoms of this substance can be isolated at one time.
