题文
Many people agree that ______ knowledge of English is a must in _______ international trade today.
| A．the, an | B．a, 不填 |
| C．the, the | D．不填, the |
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Many people agree that ______ knowledge of English is a must in _______ international trade today.
| A．the, an | B．a, 不填 |
| C．the, the | D．不填, the |
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