Martin was once “problem student”, but now he’s one of top students.A. a, aB. a, theC. t

发布时间：2020-08-23 01:03:12

Martin was once      “problem student”, but now he’s one of      top students.
A. a, a
B. a, the
C. the, a
D. the ,an

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A. a, a
(答案→)B. a, the
C. the, a
D. the ,an
解析：句意:马丁曾经是一名问题学生,但是现在他是优秀学生之一.结合语境可知前文泛指任何一名问题学生,故用不定冠词.结合前文介词of,可知下文是特指某些学生,故选B.
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