问题
选择题
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
答案
D.
考查连词。find out后引导的是宾语从句，从句中缺少about后面的宾语，故用what