B,a knowledge of..固定搭配,一門.的知識..is a must,固定搭配,.是一種必要
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Many people realized that ( ) good knowledge of English was ( ) must in international trade today.
Many people realized that ( ) good knowledge of English was ( ) must in international trade today.
A./,the
B.a,a
C.a/the
D.the,the
為什么選B,
A./,the
B.a,a
C.a/the
D.the,the
為什么選B,
英語人氣：685 ℃時間：2019-08-18 08:38:08
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