A
37. Although he is employed in the scientific and technical fields, the metric system is
____ ____________
ABC
not generally utilized in the United States.
_____
D
38. Prototypical oboes did a loud, harsh tone, but the modern oboe is appreciated
__ ____ ____
A BC
for its smooth and beautiful tone.
_______________
D
39. Beneath the deep oceans that cover two-thirds or the Earth, intriguing secret of
______________
A BC
the planet are concealed.
________
D
40. The pioneer John Chapman received the nickname "Johnny Appleseed" because
_______
A
he planted apple seedlings during him travels in what are now Ohio, Indiana, and
_________________
B CD
Illinois.