问题
选择题
Fred, who had expected how it would go with his daughter, had a great worry______ his mind.
A. on S. in C. with D. at
答案
答案：A
考查介词与名词的搭配。句意：Fred心里很担心，他一直想着他女儿的情况到底怎么样了。短语on one’s mind意为“挂念，惦记”；in one’s mind意为“在记忆里，有脑海中”