In 1952, the City of London, England, was enveloped by smog so thick that people on the streets had to feel their way around by (8) the walls of buildings! A. climbing B. walking C. tou
In 1952, the City of London, England, was enveloped by smog so thick that people on the streets had to feel their way around by (8) ________ the walls of buildings!
A. climbing
B. walking
C. touching
D. putting up