题目内容
Playing QQ's "Happy Farm" by planting, watering, fertilizing, spraying, harvesting and selling of virtual vegetables, fruits and flowers, we can find out _____ all the excitement is about.
A.that B.if C.what D.when
C
解析:
略
![](http://thumb2018.1010pic.com/images/loading.gif)
练习册系列答案
相关题目