— Shall we go and have a picnic at the weekend? — . According to the weather forecast, the

— 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

A. Why notB. We can waitC. 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。

好好学习下