請依下文回答第 57 題至第 60 題: The mission of the prison is to protect society by 57 offenders in the 58 environments of prisons that
provide work and other self-improvement opportunities to assist offenders in becoming 59 citizens. Prison
authorities must ensure that no escapes or disturbances occur in its facilities, and ensure the physical safety of
all 60 through the elimination of violence, predatory behavior, gang activity, and drug use.
【題組】58
(A) control
(B) controlled
(C) controlling
(D) being controlled