(25)
A.required
B.gained
C.acquired
D.obtained

(27)
A.poses
B.offers
C.leads
D.imposes

(29)
A.survive
B.survival
C.survivor
D.survived

(2)
A.urgent
B.practical
C.various
D.future

(3)
A.noticed
B.notified
C.remembered
D.reminded

(5)
A.excluding
B.however
C.even
D.usually

(6)
A.times
B.approach
C.ways
D.supplies

(7)
A.difficult
B.trained
C.skilled
D.professional

(9)
A.difficulty
B.chance
C.availability
D.risk

(11)
A.no
B.none
C.neither
D.not