Mr. Smith gradually _____ a knowledge of the subject.
#84266
A
attained
B
achieved
C
required
D
acquired
推荐题目
Don’t get upset—I was only ______.             .
#75081
A
amusing
B
teasing
C
pretending
D
cheating
The great man  a lot   society before he died.
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A
have contributed;on
B
had contributed;to
C
contributed;at
D
contributes;for
Once natural resources _____ , the consequence will be unimaginable.
#67961
A
use up
B
run out
C
are given out
D
run out of