题目内容：

高二英语 3道选择题,有答案,请详解
2. A library with five thousand books ______ to the nation as a gift.
A. is offered B. has offered C. are offered D. have offered
4. In this institution a medal together with a prize of certain sum of money _____ gains success in science and technology every two years.
A. are given to anyone B. is given to whoever
C. are given to who D. is given to whom
8. When and where to build the new factory ________ yet.
A. is not decided B. are not decided
C. had not decided D. have not decided
希望得到详解,谢谢!
答案：A B A