3道初中英语填空（超简单的）

3道初中英语填空（超简单的）
1.Don't do it again ,or you will be s____.
2.Both the reasons for using mobile phones less and the reasons a____
it are intersting.
3.The old photo made it possible for me to find my birthplace.（改为同义句）
I could find my birthplace ____ ____ the old photo. 是不是填 thanks to啊,不然应该填什么呢?
4.This is a book .Its cover is blue.（合并为复合句）
This is a book ____ ____ is blue.
（*主要是第一题应该怎么做啊？？ *）！！！！