____.
小明说:“我们家天天都快乐,从没有看见父母发愁,所以说我家没有烦心事。”( )
—How about _______ in the river with us?
—Sorry, I can't. My parents often tell me _______ that.
如图,AB∥CD∥EF,AF与BE相交于点G,且AG=2,GD=1,DF=5,那么 BCCE 的值等于____.
下列是我国地形特征之一是( )