It is well known that knowledge is treasure house, but practice is key to it.A. a; theB.

发布时间：2020-08-29 21:06:42

It is well known that knowledge is      treasure house, but practice is      key to it.
A. a; the
B. the; the
C. a; x
D. x; the

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(答案→)A. a; the
B. the; the
C. a; x
D. x; the
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