哥哥姐姐老师们帮帮哈Eighttimeseight____sixty-four.空里填is还是are?when+从句+where+从句作主语是谓语动词用单数还是复数?when+where作主语是谓语动词用单数还是复数?whenandwheretobuildthenewfactory

　　哥哥姐姐老师们帮帮哈

　　Eighttimeseight____sixty-four.

　　空里填is还是are?

　　when+从句+where+从句作主语是谓语动词用单数还是复数?

　　when+where作主语是谓语动词用单数还是复数?

　　whenandwheretobuildthenewfactory___notdecidedyet.(is/are)