【题目】—Shall we go for a picnic this weekend?
—Why not? _____.
A.I've got that
B.It's up to you
C.Have a good time
D.That's settled

【答案】D
【解析】句意：—这周末我们去野餐好吗？—为什么不？一言为定。I've got that ”我明白了“； It's up to you”由你决定“； Have a good time ”玩得愉快“； That's settled”一言为定“。故选D。