第6题: [单项选择]Whistling the merry tune, ______ A. the tire was fixed B. the tire is fixed by Jack C. Jack fixed the tire D. Jack fixed with the tire 参考答案:C 答案解析:由于分词whistling是动词whistle的现在分词形式,所以可以判定句子的主语将在和whistle(吹口哨)是主动关系。备选项中Jack和whistle是主动关系,所以排除A,B两项。本句意是: