Looking at the map, we can see that (1) the lights-out activities are carried out from east to west in turn. The names of the continents represented by the letters in the map are: A Europe; Africa; C north America. (2) The continent where Fiji and New Zealand are located is Oceania. (3) In terms of seasons, ① it has entered the spring of the year. ② Compared with ③, ② has more precipitation. (4) From the land and sea position, China is located in the east of mainland A and the west of ocean B..

So the answer is: (1) Europe; Africa; North America; (2) Oceania;

(3) spring; ②; (4) East; West side.