摘要： Many clothing manufacturers now substitute artificial silk natural silk to cut down costs of production. A. with B. by C. for D. of
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Many clothing manufacturers now substitute artificial silk _____ natural silk to cut down costs of production．
|
A．with |
B．by |
C．for |
D．of |
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Many clothing manufacturers now substitute artificial silk _____ natural silk to cut down costs of production．
- A.with
- B.by
- C.for
- D.of