A student is writing an essay for his teacher about the Berlin Wall. Read the sentences from the draft of his report and answer the question that follows.
The Berlin Wall
The greatest symbol of the Cold War between the United States and the Soviet Union was the Berlin Wall. The Soviets had long been concerned about the migration of East Berliners into the western, free sector of Berlin. In 1960, they addressed this concern by closing the roads between East and West Berlin and building a concrete wall with guards at exit and entry checkpoints. This action left West Berlin completely surrounded by Soviet territory. It is difficult to describe how cut off from everyone and everything the people of West Berlin must have felt when the Soviet Union first erected the wall across the city. “We were a little island of freedom,” said Mr. Venchk, “surrounded by a sea of oppression.”
Which more precise word best replaces the underlined phrase?
A. divided
B. isolated
C. detached
D. separated
English glossary :
migration : movement of people addressed :dealt with erected :built