Playing QQ’s “Happy Farm by planting, watering, fertilizing, spraying, harvestin

Playing QQ’s “Happy Farm” by planting, watering,fertilizing, spraying, harvesting and selling of virtual vegetables, fruits andflowers, we can find out        allthe excitement is about.

A. that      B. if          C.what     D. when

试题答案

【答案】

C

【解析】

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