【题目】The man who thought of (combine) a gas engine wheels was the inventor of automobiles.
在线课程【答案】combining；with
【解析】句意：把燃气机和轮子结合在一起的人是汽车的发明者。combine…with…，“把….与….结合起来”分析句子可知，combine是做think of 的宾语，所以要用动词的ing形式做宾语，故用combining…with。因此答案为(1). combining (2). with