A production plants
B home offices
C sales representatives
D chemical laboratories
9The members of Aaron Burr’s family were noted for their passionate and headstrong temperament.
A intellectual
B stubborn
C witty
D steadfast
10If roundworms are removed from the soil and placed in a liquid, they thrash helplessly around.
A carelessly
B tirelessly
C powerlessly
D heartlessly
11Due to the tilt of Neptune’s axis, the Sun heats the planet’s northern and southern hemispheres unequally.
A climates
B halves
C atmospheres
D contours
12Compared with large aircraft, small airplanes are not as streamlined and hence are less efficient.
A at a glance
B to a measurable degree
C in most cases
D as a result
13Sedimentary rocks cover much of the Earth’s surface, but they are often hidden by a thinveneer of soil.
A concealed
B eroded
C protected
D softened
14To cool itself, a rhinoceros soaks in mud or water because its thick hide has no sweat glands.
A skin
B tongue
C horn
D trunk
15Charles Whecler’s paintings often highlight the sharp edges and geometrical shapes of machines.
A extend
B emphasize
C distort
D soften