16. The outer layer of the heart, called the pericardium, forms a sac in what the heart lies.
A B C D
17. Wood from the ash tree becomes extremely flexibly when it is exposed to steam.
A B C D
18. The ability to talk is one of the skill that make humans different from the rest of the animal world.
A B C D
19. In plane geometry, the sum of the internal angles of any triangle has always equal to 180 degrees.
A B C D
20. Polar bears are bowlegged and pigeon-toed, adaptations that enable this
A B
massive animals to maintain their balance as they walk.
C D
21. Caves are formed by the chemical or action mechanical of water on soluble
A B
rock, by volcanic activity, and by earthquakes.
C D
22. Celery, an edible plant is having long stalks topped with feathery leaves,
A B C
grows best in cool weather.
D
23. The first fiction writer in the United States to achieve international fame
A B C
was Washington Irving, who wrote many stories, included " Rip Van Winkle" and
D
"The Legend of Sleepy Hollow".
24. Three fundamental aspects of forest conversation are the protection of
A
immature trees, the use of proper harvesting methods, and provide for an
B C
environment that supports reproduction.
D
25. For each enzyme reaction there is an optimum temperature which maximum
A B C
efficiency is achieved.
D
26. Adolescence is a transitional stage in human development from the beginning
A B
of puberty to the attainment of the emotion, social, and physical maturity of
C
adulthood.
D
27. The people native to the northwest coast of North American have long
A
be known for wood carvings of stunning beauty and extraordinary quality.
B C D
28. Colonial efforts to manufacture glass at Jamestown---- and later attempts
A B
near Philadelphia and Boston---failed despite the abundant of fuel and good raw
C
materials.
D
29. The orbit of a celestial body is usually in the shape of ellipse.
A B C D
