It's Sunday afternoon. The weather is fine. There is a football match between class 2 and class 4. Many students are watching. They're excited. Now, Zhang Wei has the ball. He passes it to Wei Kun. But Wei Kun can't kick the ball. Then John has the ball. The ball flies to Zhang Wei's arm. Zhang Wei is very angry. The ball files into the goal. How is Zhang Wei feeling? He is so happy! Class 4 won the game. Class 2 is very sad.

①中医：病之虚实者，出者为虚，入者为实

②兵法：夫兵形象水，水之行，避高而趋下；兵之形，避实而击虚

③古诗词：写景为实，抒情为虚，虚由实生，实仗虚行

④书法：以虚明实，实处之妙皆因虚处而生

小明同学去年寒假随爸爸到了欧洲西部的多个国家，据此完成下面小题．