A.carry
B.start
C.smart
D.card

(21)
A.tried
B.sought
C.asked
D.gone

(23)
A.when
B.who
C.that
D.which

(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