题目

下列关于有机物性质的说法正确的是A．乙烯和甲烷都可以与氯气反应B．乙烯和聚乙烯都能使溴的四氯化碳溶液褪色C．乙烯和苯都能使酸性高锰酸钾溶液褪色D．乙烯和乙烷都可以与氢气发生加成反应  答案：A解析: I will spend as much time as I can English during this summer holiday.A. practice speaking B. practice listeningC. practicing speaking D. practicing listening C 【解析】句意：暑假期间，我将尽可能多地练习说英语。考查动词形式辨析题。spend some time doing sth.花费时间做某事，practice doing sth.练习做某事，都是固定短语。根据句意结构和语境，可知选C。