Tom is keen surfing the Internet in his spare time. A. at B. on C. to D. in——青夏教育精英家教网—

摘要： Tom is keen surfing the Internet in his spare time. A. at B. on C. to D. in

网址：http://m.1010jiajiao.com/timu_id_3580970[举报]

Tom is keen _____ surfing the Internet in his spare time.

A. at B. on C. to D. in

Tom is keen _____ surfing the Internet in his spare time.

A. at B. on C. to D. in

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