save for a rainy day

save for a rainy day save some for a rainy Provides for a rainy day save it for a rainny day reserve for the rainy day Save it for a raining day怎么记 in a rainy day还是on a rainy day? in a rainy day or on a rainy day,为什么 it is a rainy day in a rainy day还是on a rainy day?He returned_____ a rainy day It's a rainy day.(rainy day划线提问) he went out for a walk every day ()rainy days.a.besides b.wi