选择B.have 分析:①Why not + 动词原形?——为什么不做某事呢?(表建议)
如题,Why not have a party?意为“为什么不举行个派对呢?”,即建议举行个派对。
②Why not do sth?=Why don't you do sth?你为什么不做某事呢?
如题,此句可以改为Why don't you have a party?
③另外,可用于表达建议的句型有:What /How about doing? 此句可改为:What/How about having a party?...