阅读理解。 Mariah Evans at the University of Nevada, Reno, led a 20-year study which asked adults in 27 countries to tell the number of books that were in their home while they were growing up. Their answers showed that children raised around books spend more years in school, even if their parents are poor and illiterate (没文化 的). Mariah Evans said, 'What we found was that there is a very big effect of growing up in a bookish home on children's success in school. Children who grow up in homes where there are more books go further in education. And additional (额外的) books are especially important for children who come from families where the parents aren't terribly highly educated. The books can be stories, sports, travels and anything. But there, we're seeing that the books that have the most effect are history and science.' 'It says that there really is a contribution that parents can make to their children's education. And it doesn't mean that you have to turn into somebody like me whose walls are lined with books. 'But it really does mean that if you spend a few minutes most days a week reading to your children, and if they see you reading from time to time, and if you talk about books with them from time to time, and when somebody asks a question, say 'let's look it up' instead of discussing it as a matter of opinion-that all those things can actually make quite a great difference to children in their education.' 1. It can be inferred from the passage that _____. [     ] A. it is more difficult for children raised around books to finish school B. highly educated parents prevent a child going further in education C. more books are needed by children from poor and illiterate families D. children with poor parents don't spend as many years in school 2. According to the author, the books most important for the children are _____. [     ] A. history and science B. sports and education C. stories and travels D. all kinds of subjects 3. Wise parents can make quite a great difference to children in their education by _____. [     ] A. turning themselves into somebody whose walls are lined with books B. spending some minutes most days a week playing with their children C. discussing them rather than looking up questions with their children D. talking about books with their children from time to time 4. This passage mainly talks about _____. [     ] A. the effect of bookish home on children B. the importance of parents C. the necessity of reading more books D. the interest of children in books