Playing QQ’s “Happy Farm by planting, watering, fertilizing and harvesting veget

Playing QQ’s “Happy Farm” by planting, watering, fertilizing and harvesting vegetables, fruits and flowers, we can find out _______ all the excitement is about.

A. that 　 B. if 　 C. when D. what

试题答案

D

考查宾语从句。What在从句中充当宾语。