题目

The Browns love their son so much that they always want to stop him from        into trouble. A. gets            B. to get               C. getting              D. will get 答案：C。考查固定短语。stop sb. from doing sth. 阻止某人做某事。句意: 布朗夫妇如此爱他们的儿子以至于他们总是想阻止他陷入麻烦中。 【易错误区】 stop sb. from doing sth. 阻止某人做某事 =prevent/keep sb. from doing sth. stop doing sth. 停止做某事 stop to do sth. 停下来去做某事黑火药爆炸时发生的反应是S+2KNO3+3C点燃K2S+3CO2↑+N2↑，反应中被还原的物质是 ，被氧化的物质是 ，每生成1mol CO2转移 mol电子．