Many people agree that ______ knowledge of English is a must in _______ international trade today.
A．the, anB．a(chǎn), 不填C．the, theD．不填, the
B
knowledge 雖為不可數(shù)名詞，但其前卻可用不定冠詞，表示某種程度的知識，有類似some的意思；第二空不填冠詞，是因為trade 為不可數(shù)名詞，表示泛指時不用冠詞。
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