4. a report by the university of aurora business school ( ) that three out of every four new businesses are from personal savings accounts.

　　a. founded

　　b. finding

　　c. found

　　d. find

　　【答案】c。句意为：据奥罗拉大学商学院统计，四分之三的新企业来自个人储蓄账户。已经发现了，选择find的过去式，所以答案选c。

　　5.the united states, which is a ( ) of the middle east peace talks, says israeli settlements are an obstacle to peace, and the issue has strained relations with israel's right-wing government.

　　a. contributor

　　b. sponsor

　　c. volunteer

　　d. investor

　　【答案】b。句意为：作为中东和谈的发起国之一的美国说，以色列的定居点是和平的障碍，这个问题使与以色列右翼政府的关系紧张。a.贡献者;b.赞助者;c.志愿者;d.投资者。所以答案选b。