二、單項(xiàng)填空(本節(jié)有10小題,每小題1分,共10分)
21. Many people agree that ______ knowledge of English is a must in ______ international trade today.

A.a(chǎn); 不填B.the; anC.the; theD.不填; the

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二、單項(xiàng)填空(本節(jié)有10小題,每小題1分,共10分)

21. Many people agree that ______ knowledge of English is a must in ______ international trade today.

  A. a; 不填     B. the; an      C. the; the      D. 不填; the

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