33．Gone are the days when China, a major economic power in Asia today, ________ at the mercy of others.
A．was B．is
C．had been D．were
答案与解析：A 题干中的a major economic power in Asia today短语是从句主语China的同位语，根据题意可知when引导的定语从句应该使用过去时态。
34．The Burj Dubai Skyscraper will reach a height of 700 meters, ________ is said to be the highest building around the world.
A．it B．that
C．where D．which
答案与解析：D 句意：杜拜塔的高度将达到700米，据说将是世界上最高的建筑物。非限制性定语从句中缺少主语，且先行词指代the Burj Dubai Skyscraper，故用关系代词which引导。
