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She makes effort to learn maths and she has made great progress in it. A. an ; a

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She makes effort to learn maths and she has made great progress in it. A. an ; a

 She makes _______ effort to learn maths and she has made _______ great progress in it.

  A. an ; a                B. / ; a                  C. the ; /                D. an ; /

试题答案

D