问题
选择题
I think English is _____ must in _____ international trade nowadays. [ ]
A. a; the
B. the; a
C. a; /
D. /; the
答案
答案：C
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I think English is _____ must in _____ international trade nowadays. [ ]
A. a; the
B. the; a
C. a; /
D. /; the
答案：C