1. ______ the opening ceremony of the first China International Import Expo in Shanghai was President Xi, where he announced new measures to further expand opening-up,
A. Attending B. Attended C. To attend D. Having attended
【答案解析】 A
【详解】考查完全倒装和表语提前。句意：参加首次中国国际进口博览会开幕仪式的是习主席，他在此宣布将会采取新的措施扩大对外开放。动词的现在分词一般式和过去分词适用于表语提前，主语President Xi和attend（出席）构成主动关系，所以用现在分词一般式的主动，表示“正在参加”，故选A。
2. The Internet is one of the ways these feelings are conveyed and perhaps never before ______so much to connect different peoples and nations.
A. did it serve B. it has served C. was it served D. has it served
【答案解析】 D
【详解】考查倒装句。句意：互联网是传达这些情感的一种方式，或许它从未如此有效地将不同的民族和国家联系起来。根据时间状语before可知，serve表示对现在的影响，用现在完成时，never置句首，句子使用部分倒装，主语是The Internet是第三人称单数，综上可知，D项正确。故选D。
