would have been more appropriate怎么理解?

would have been more appropriate怎么理解?How customs vary around the worldIt is not only inSouth Korea that greetings can offend (冒犯) others.A handshakecan also be a faux pas (失礼)in France if a kiss on the cheek (33) (be) more appropriate (恰当的).In Japan,it is impolite not to bowlower than the other person when greeting.In the UK and the US,the “okay” signis a positive gesture but in Greece and Turkey it is seen as very vulgar (粗俗的).33题答案给的would have been 这里为什么变would have been虚拟语气?不能填would be 或者不用虚拟语气填is 为什么?