【题目】When the news came, the boys all became so excited, ________their hats into the air．
A. to throw B. thrown C. throwing D. were throwing
在线课程【答案】C
【解析】考查非谓语动词。句意：消息传来，男生们都很激动，将他们的帽子扔向空中。根据与前一句之间是逗号隔开，没有连词，故判断此处用非谓语动词，与主语the boys是主动关系，故用动词的-ing形式throwing 作伴随状语。