— Shall we go and have a picnic at the weekend?
— . According to the weather forecast, there might be a cold front by then．
A. Why not
B. We can wait
C. No, let's not
D. It depends
网友回答
A. Why not
B. We can wait
C. No, let's not
(答案→)D. It depends
解析：考查交际用语：A. Why not为什么不？B. We can wait我们能等，C. No, let's not不，别这样， D. It depends 那就看情况而定了，句意：――这个周末我们去野餐好吗？从答语的：根据天气预报，那时有可能有冷空气前锋，所以是看情况而定。选Ｄ。