第1题: [单项选择](It is said) that Einstein felt (very) (sad) about the application of his theories (onto) the creation of weapons of war. A. It is said B. very C. sad D. onto 参考答案:D 答案解析:改为to。apply A to B“将A应用于B”是固定结构,当apply转为名词application时,也还保留该介词,不该用onto。