标题: a grammar question [打印本页] 作者: toefl_2003 时间: 2003-6-19 00:14 标题: a grammar question 37. A common way to produce x-rays is _________ electrons into a copper target. A fires B fired C by firing D how to fire
I find that each answer sound not good. Though I choose C, which is the right answer, I don't know why. If someone knows the rule, could you tell me, please? If you can give me another example, it will be better.作者: Trunnity 时间: 2003-6-19 06:35
我认为选C， 表方式。 也可以用排除法。A是动词，显然不可以，B，被动语态后不能接宾语，所以也不对，D, 语义不对。
