题目

How happy we are! The holiday we have been looking forward _______ at last. A. to has come               B. to have come C. to having come            D. has come   答案：Athe holiday为句子主语，we have been looking forward to 是修饰主语的定语从句(介词 to 的宾语是引导该定语从句的关系代词 that，被省略)，has come 是句子谓语。若Z=11-i-i，则|Z|=（　　） A、12B、22C、32D、2