Read and write. 你能按要求变换句型吗？

1. Li Lei is twelve years old.  (对划线部分提问)

                 ______ is Li Lei?

2. Tom goes to school by bus. (对划线部分提问)

                              Tom go to school?

3. I read books every morning. (主语改为My sister)

     My sister              books every morning.

广场上，原来有一块边长是45米的正方形花圃，扩大后的边长增加了15米，花圃的面积增加了______平方米．