Most people think that English is useful language but some students think it’s unimport

问题补充：

Most people think that English is useful language, but some students think it’s unimportant subject.

A. a, an

B. a, a

C. an, an

D. an, a

答案：

(答案→)A. a, an

B. a, a

C. an, an

D. an, a

解析：句意：大部分认为英语是一门有用的语言，但是一些学生们认为它是一门不重要的科目。结合语境可知上文泛指任何一门有用的语言，故用不定冠词，useful词首音素是辅音，故不定冠词用a。下文泛指任何一门不重要的科目，故也用不定冠词，unimportant词首音素是元音，故不定冠词用an。选A。