The city of Washington, D.C. is located in its current place because the Potomac River was not _______ any further upstream, and earlier settlers relied upon ships being able to come up the Potomac.
A.
abhorred
B.
divergent
C.
navigable
D.
pedestrian
6.
The so-called "robber barons" were able to _____ considerable wealth by making a good profit while developing railroads in the United States.
A.
amass
B.
entrust
C.
obstruct
D.
verify
7.
It is more humane to use bait to _____ unwanted animals so that they can be trapped and released elsewhere.
A.
amass
B.
entice
C.
obscure
D.
repel
8.
The spectators were left______ when the tiger attacked the performer at the circus.
A.
aghast
B.
dynamic
C.
malicious
D.
respectable
9.
The boundaries of Canada _______ millions of acres of undeveloped land.
