问两道sat语法题1.When Doris Lessing published The Golden Notebook

问两道sat语法题
1.When Doris Lessing published The Golden Notebook in 1962,it instantly established herself as one of the most important leterary voices of her generation.
是个ISE it instantly 的 it 错了 哪错了?是it不能指句子吗 可是我觉得it指的就是 The Golden Notebook呀
2.Only by camping outside overnight was the fan able to reserve what was beginning to look like the last available concert ticket.
还是ISE 这个看不懂.划线的是 Only by camping 和 was 和 to reserve 和 what was beginning