双基限时练(八) module 2 section ⅳ 基 础 夯 实 ⅰ.单句语法填空用所给词的适当形式填空(不多于3个单词) 1．________ (not; receive) a reply, he decided to write again to ask about what was going on. 答案与解析 not having received 现在分词完成式作状语，表示原因。非谓语动词的否定式not放在其前面。 2．thousands of happy rio residents gathered in streets, ________ (celebrate) the historic decision that the 2016 olympic
