Many people agree that___knowledge of English is a must in___international trade today.
A.a(chǎn);/B.the; an C.the; theD./; the
A
此處knowledge 表示“知道;熟悉”,是know的名詞形式,常與不定冠詞連用。trade 指“某種貿(mào)易”,通常不與冠詞連用。
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