(24)
A.remain
B.continue
C.persist
D.endure

(27)
A.which
B.whom
C.who
D.what

(28)
A.Moreover
B.However
C.Therefore
D.So that

(30)
A.time
B.warning
C.term
D.notice

A.dig
B.agency
C.charge
D.exchange

(1)
A.give
B.work
C.put
D.take

(3)
A.out
B.under
C.of
D.on

(4)
A.unattainable
B.immeasurable
C.undetectable
D.impassable

(7)
A.count
B.score
C.memory
D.patience

(8)
A.whose
B.which
C.of which
D.who