According to the rhythm of the poem, complete the following proverb (fill in the serial number) and tell me what you will do for four situations before you plan your trip.

A-3, when the clouds are heading north, you will get better if you bask in bask in the quilt. Wear a hat, sunglasses, water and cool oil to prevent heatstroke;

B-2, the clouds are heading west, and the water is accumulated, that is, it rains, so you should bring umbrellas and other rain gear;

C-4, the cloud is eastward, and there is wind, which means there is wind. It is best to wear a mask, etc.

D- 1, clouds heading south, Shui Piao boat, which also means rain.