甲乙各整理一箱相同的文件，甲先整理1.5小时，乙整理了4小时后追上甲，如果乙每小时多整理5个文件，那么3小时就可以追上，问乙实际每小时整理多少个文件？（ ）

(单选题)He wasn’t asked to take on the chairmanship of the society, (单选题)They came to the conclusion ( ) by a computer. (单选题)We have been hearing ( ) accounts of your work. (单选题)Don’t throw away pens and erasers ( ) you haven’t used up (单选题)I don’t like ( ) bills but when I do get them I like ( (单选题)In his plays Shakespeare ( ) his characters live through (单选题)Intellect is to the mind ( ) sight is to the body. (单选题)The first two stages in the development of civilized man wer (单选题)It can be inferred from the last paragraph that auto compani (单选题)Who does the author think should have addressed the problem?