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题目内容
（郑州工程技术学院-大学英语（2）.）
2.
Mary is keen on ( ) conjuring tricks.
(A) perform
(B) being performed
(C) performing
(D) performed
Mary is keen on ( ) conjuring tricks.
(A) perform
(B) being performed
(C) performing
(D) performed
参考答案
