Going abroad for further education is enjoyable experience for Tom.A. a; anB. 不填；anC. 不填；

问题补充：

Going abroad for further education is enjoyable experience for Tom.

A. a; an

B. 不填；an

C. 不填；不填

D. the; the

答案：

A. a; an

(答案→)B. 不填；an

C. 不填；不填

D. the; the

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