【真题体验】

　　1. A variety of activities should be organized so that participants can remain active as long as they want. [2003, 完型]

　　分析：

　　A. 分析句子结构。主句是被动结构，a variety of activities 是主语，be organized 是谓语;so that 引导目的状语从句，participants can remain active 是从句主句，as long as they want意思是“尽可能长时间地”。

　　B. 译文：应该组织各种各样的活动，以便于参与者能够尽可能长时间地保持活跃。

　　2. There are upsetting parallels today, as scientists in one wave after another try to awaken us to the growing threat of global warming. [2005, text 2]

　　分析：

　　A. 分析句子结构。该句的主句是There are upsetting parallels today，是 there be句型，主语是upsetting parallels;as scientists in one wave after … threat of global warming是as引导的时间状语从句，as表示“当/在……时候”，主语是scientists，谓语动词是try。

　　B. 译文：在科学家一次又一次努力使我们意识到日益增长的全球变暖威胁的时候，今天还有许多类似的令人不安的事情。