问题
选择题
Most people think that English is _____ useful language, but some students think it's _____ unimportant subject. [ ]
A. a, an
B. a, an
C. an, an
D. an, a
答案
答案：A
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Most people think that English is _____ useful language, but some students think it's _____ unimportant subject. [ ]
A. a, an
B. a, an
C. an, an
D. an, a
答案：A