57. "overcrowding, jam, bottleneck"
d. foundation
b. congestion
c weld
a. Construct
58 "when something is easily or suitably available"
d. conveniently
c. entirely
b. honors
a. standards
59. "very high building"
d. antenna
c. elevator
b, rectangular
a. skyscraper
60. "A person who engages in terrorism."
d. burglar
c. thief
b. robber
a. terrorist