单选题：He's given me so much help that I really want to do somethi..

He wants to see changes in the company and I am sure he will ______. [ ]A. on time B. at a time C. at one time D. in time

The old man has devoted half his life _____ helping the weak. [ ]A. of B. to C. by D. for

I don't think Tom's remarks are _____; he is not supposed to say so. [ ]A. in peace B. in place C. in trouble D. in surprise

I don't think it was an accident at all. Your brother did it _____. [ ]A. for purpose B. on purpose C. in order D. by chance

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。增加：在缺词处加一个漏字符号（ ^ ），并在其下面写出该加的词。删除：把多余的词用斜线（ \ ）划掉。修改；在错的词下划一横线，并在该词下面写出修改后的词。注意：1. 每处错误及其修改均仅限一词； 2. 只允许修改10处，多者（从第11处起）不计分。 I often quarrel about my mother over whether I can s