--- What have you been doing recently? --- I a trip to Shanghai and have just returned. A. ——青夏教育精英家教网—

摘要： --- What have you been doing recently? --- I a trip to Shanghai and have just returned. A. took B. have taken C. had taken D. have been taking

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--- What have you been doing recently?

--- I _____ a trip to Shanghai and have just returned.

A．took B．have taken C．had taken D．have been taking

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