【题目】戴口罩是阻止病毒传播的有效方式。(keep)
在线课程【答案】Putting on a face mask is an effective way to keep virus from spreading.
【解析】
考查东名词作主语和固定搭配。分析句子结构，该句用动名词作主语，谓语动词用单数；固定词组：keep sb. from doing sth.阻止某人做某事。再结合所给汉语可知翻译为Putting on a face mask is an effective way to keep virus from spreading.