—We can have a day out tomorrow. Why don't we go fishing ? —________
A．That's OK.
B．What a great idea!
C．Yes, you are all right.
D．Thanks a lot.
答案：B
试题分析：句意：——明天我们能出去一天。为什么我们不去钓鱼呢？——好主意！A. That's OK. 没关系； B. What a great idea! 好主意！C. Yes, you are all right.是的，你都是对的； D. Thanks a lot. 谢谢；根据Why don't we go fishing ? 可知此处是建议去钓鱼，同意就可以说That’s good/ great idea。故选B。 考点：考查交际用语的用法。