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A．happily
B．occasionally
C．reluctantly
D．accurately

A．as
B．if
C．because
D．while

A．little
B．much
C．some
D．any

A．genuine
B．practical
C．pure
D．clever

A．came
B．arrived
C．stemmed
D．appeared

A．generating
B．effective
C．motivating
D．creative

A．But
B．And
C．Besides
D．Even

A．employed
B．created
C．opera,ed
D．controlled

A．plan
B．use
C．idea
D．means

A．now
B．and
C．all
D．so

A．single
B．sole
C．specialized
D．specific

A．ago
B．past
C．ahead
D．before

A．few
B．those
C．many
D．all

A．origins
B．sources
C．bases
D．discoveries

A．proposed
B．developed
C．supplied
D．offered

A．seldom
B．sometimes
C．usually
D．never

A．of
B．with
C．to
D．as

A．cases
B．reasons
C．factors
D．situations

A．less
B．better
C．more
D．worse